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BY PROGRAMMING LANGUAGE

Originally, this list included a section called "Language Agnostic" for books about programming subjects not restricted to a specific programming language. That section got so big, we decided to split it into its own file, the BY SUBJECT file.

App Inventor

Absolute App Inventor 2 - Hossein Amerkashi
App Inventor 2 - David Wolber, Hal Abelson, Ellen Spertus, Liz Looney

Arduino

Arduino Programming Notebook - Brian Evans (PDF) (🗃️ archived at unglue.it)
Arduino Tips, Tricks, and Techniques - lady ada (PDF)
Getting started with Arduino – A Beginner’s Guide - Brad Kendall (PDF)
Getting Started with Arduino products - Official Arduino Documentation (🚧 in process)
Introduction to Arduino
Introduction to Arduino : A piece of cake! - Alan G. Smith
Open softwear - Fashionable prototyping and wearable computing using the Arduino - Tony Olsson, David Gaetano, Jonas Odhner, Samson Wiklund (PDF)

ASP.NET

Architecting Modern Web Applications with ASP.NET Core and Microsoft Azure (2020) - Steve "ardalis" Smith (PDF) (🚧 in process)
ASP.NET MVC Music Store
ASP.NET WebHooks Succinctly - Gaurav Arora
ASP.NET with C# (2008) - Vijay Mukhi, Sonal Mukhi, Neha Kotecha
Diving into ASP.NET WebAPI (2016) - Akhil Mittal (PDF)
Intro to ASPNET MVC 4 with Visual Studio 2011 Beta (2012) - Rick Anderson and Scott Hanselman (PDF)
Introducing ASP.NET Web Pages 2 (2012) - Mike Pope (PDF)

ASP.NET Core

ASP.NET Core 3.1 Succinctly - Simone Chiaretta, Ugo Lattanzi
ASP.NET Core Documentation - Microsoft Docs
The Little ASP.NET Core Book (2018) - Nate Barbettini (PDF)

Blazor

Blazor: A Beginner's Guide - Ed Charbeneau (PDF) (email address requested, not required)
Blazor for ASP.NET Web Forms Developers - Daniel Roth, Jeff Fritz, Taylor Southwick (PDF)

Assembly Language

ARM Assembly Language Programming - Peter Knaggs (PDF) (🚧 in process)
Assemblers And Loaders (1993) - David Salomon (PDF)
Assembly Language Succinctly - Christopher Rose, Syncfusion Inc. (HTML, PDF, EPUB, Kindle)
PC Assembly Language - P. A. Carter
Professional Assembly Language (PDF)
Programming from the Ground Up - Jonathan Bartlett (PDF)
Ralf Brown's Interrupt List
Software optimization resources - A. Fog
The Art of Assembly Language (2003) - Randall Hyde (PDF)
WebAssembly friendly programming with C/C++ - Ending, Chai Shushan, Yushih (HTML, 📦 examples)
Wizard Code, A View on Low-Level Programming - Tuomo Tuomo Venäläinen (PDF)
x86-64 Assembly Language Programming with Ubuntu - Ed Jorgensen (PDF)
x86 Assembly - Wikibooks
x86 Disassembly - Wikibooks
Zen of Assembly Language: Volume I, Knowledge (1990) - Michael Abrash

Non-X86

Easy 6502 - Nick Morgan
Machine Code for Beginners [Z80 and 6502 CPUs] - Lisa Watts and Mike Wharton (PDF) (Scroll to bottom and click on book cover)
Machine Language for Beginners - Richard Mansfield [6502 CPU]
Programmed Introduction to MIPS Assembly Language
The Second Book of Machine Language

AutoHotkey

AutoIt

AutoIt Docs - Jonathan Bennett (HTML)

Autotools

Awk

An Awk Primer - Wikibooks
Awk - Bruce Barnett
Gawk: Effective AWK Programming - Arnold D. Robbins (HTML, PDF)
GNU awk - Sundeep Agarwal

Bash

Advanced Bash-Scripting Guide - M. Cooper (HTML)
Bash Guide for Beginners (2008) - M. Garrels (HTML)
Bash Notes for Professionals - Compiled from StackOverflow documentation (PDF)
BASH Programming (2000) - Mike G. (HTML)
Bash Reference Manual (HTML)
Bash tutorial - Anthony Scemama (PDF)
BashGuide - Maarten Billemont (HTML) (PDF)
Conquer the Command Line - Richard Smedley (PDF)
Conquering the Command Line - Mark Bates (HTML)
Getting Started with BASH (HTML)
GNU Bash manual (PDF)
Google Shell Style Guide - Paul Armstrong (HTML)
Introduction to Bash Scripting - Bobby Iliev (Markdown, PDF)
Introduction to the Command Line - Launch School (HTML)
Linux Shell Scripting Tutorial - A Beginner's Handbook (2002) - Vivek G. Gite (HTML)
Linux Shell Scripting Tutorial (LSST) v2.0 - Vivek Gite (HTML)
Slackbook (2005) - Alan Hicks, Chris Lumens, David Cantrell and Logan Johnson (HTML, DocBook, Postscript, PDF)
The Bash Academy - Maarten Billemont (HTML)
The Linux Command Line - William E. Shotts, Jr. (PDF)
Writing Shell Scripts - William E. Shotts, Jr. (HTML)

Basic

10 PRINT CHR$(205.5+RND(1)); : GOTO 10 - Nick Montfort, Patsy Baudoin, John Bell, Ian Bogost, Jeremy Douglass, Mark C. Marino, Michael Mateas, Casey Reas, Mark Sample, Noah Vawter
A beginner's guide to Gambas - John W. Rittinghouse (PDF)
Pick/Basic: A Programmer's Guide - Jonathan E. Sisk

BeanShell

Beanshell Simple Java Scripting Manual - beanshell.org (PDF)
BeanShell User's Manual - beanshell.org (HTML)

BETA

MIA 90-02: BETA Compiler - Reference Manual - Mjølner Informatics
MIA 94-26: BETA Language Introduction - Tutorial - Mjølner Informatics
MIA 99-41: BETA Language Modifications - Reference Manual - Mjølner Informatics
MIA 99-42: The Fragment System: Further Specification - Mjølner Informatics
Object-Oriented Programming in the BETA Programming Language - Ole Lehrmann Madsen, Birger Møller-Pedersen, Kristen Nygaard

C

256-Color VGA Programming in C - David Brackeen
A Tutorial on Pointers and Arrays in C - Ted Jensen (PDF)
An Introduction to C & GUI Programming - Simon Long (PDF)
Bare-metal programming for ARM - Daniels Umanovskis (PDF)
Beej's Guide to C Programming - B. Hall (HTML, PDF)
Beej's Guide to Network Programming - Using Internet Sockets - B. Hall
Beej's Guide to the GNU Debugger (GDB) - B. Hall (HTML)
Build Your Own Lisp - Daniel Holden
C Elements of Style - Steve Oualline
C for Python Programmers - Carl Burch
C Notes for Professionals - Compiled from StackOverflow Documentation (PDF)
C Programming - Wikibooks
C Programming Boot Camp - Paul Gribble
C Programming Tutorial - Tutorialspoint (HTML)
Coursebook - B. Venkatesh, L. Angrave, et al.
Deep C
Essential C - Nick Parlante (PDF)
Everything you need to know about pointers in C - Peter Hosey
Functional C (1997) - Pieter H. Hartel, Henk Muller (PDF)
Hashing - Prakash Hegade
Learn to Code With C - The MagPi Essentials (PDF)
Learning GNU C - Ciaran O’Riordan (PDF)
Let us C - Yashavant Kanetkar (PDF) (🗃️ archived)
Modeling with Data - Ben Klemens (PDF)
Modern C - Jens Gustedt (PDF)
Object-Oriented Programming With ANSI-C (PDF)
Programming in C - Bharat Kinariwala & Tep Dobry
Programming in C - Kishori Mundargi
Structures and C - Prakash Hegade
The Basics of C Programming - Marshall Brain (PDF)
The C book - Mike Banahan, Declan Brady and Mark Doran (PDF, HTML)
The C Programming Language Handbook - Flavio Copes (PDF, EPUB, Kindle) (email address requested)
The Craft of Text Editing or A Cookbook for an Emacs - Craig A. Finseth
The Current C Programming Language Standard – ISO/IEC 9899:2018 (C17/C18), Draft - Open Standards Org - www.open-std.org (PDF)
The GNU C Programming Tutorial - Mark Burgess, Ron Hale-Evans (PDF)
The GNU C Reference Manual - Trevis Rothwell, James Youngman (HTML) (PDF)
The little book about OS development - Erik Helin, Adam Renberg
The New C Standard - An Economic and Cultural commentary (2009) - Derek M. Jones (PDF)
TONC GBA Programming - Game Boy Advance Development

C Sharp

C# Notes for Professionals - Compiled from StackOverflow documentation (PDF)
C# Programming - Wikibooks
C# Programming Yellow Book - Rob Miles (PDF) (2019)
C# Smorgasbord - Filip Ekberg (HTML) (PDF, EPUB, MOBI) (2018)
C# Tips - Jason Roberts (Leanpub account or valid email requested)
Creating Mobile Apps with Xamarin.Forms C# - Charles Petzold
Daily Design Patterns - Matthew P Jones (PDF)
Data Structures and Algorithms with Object-Oriented Design Patterns in C# - Bruno Preiss
Dissecting a C# Application - Christian Holm, Bernhard Spuida, Mike Kruger
Fundamentals of Computer Programming with C# (the Bulgarian Book) - Svetlin Nakov, Veselin Kolev et al. (HTML, PDF, EPUB)
High level asynchronous programming with Reactive Extensions - Emil Petro
Introduction to Rx
Learn C# in Y Minutes
Mastering Xamarin UI Development, Second Edition - Steven F. Daniel (Packt account required)
.NET Book Zero - Charles Petzold (PDF, XPS)
.NET Microservices: Architecture for Containerized .NET Applications - Cesar de la Torre, Bill Wagner, Mike Rousos (PDF)
Threading in C#
Xamarin.Forms for macOS Succinctly - Alessandro Del Sole
Xamarin.Forms Succinctly - Alessandro Del Sole

C++

C++ Annotations - Frank B. Brokken (HTML, PDF)
C++ Core Guidelines - Editors: Bjarne Stroustrup, Herb Sutter
C++ GUI Programming With Qt 3 - Jasmin Blanchette, Mark Summerfield (PDF)
C++ Language
C++ Notes for Professionals - Compiled from StackOverflow Documentation (PDF)
C++ Programming - Panic, et al
C++ Succinctly, Syncfusion (PDF, Kindle) (email address requested, not required)
C++ Tricks
CS106X Programming Abstractions in C++
Elements of Programming - Alexander Stepanov and Paul McJones - (PDF)
Financial Numerical Recipes in C++ - Bernt Arne Ødegaard (PDF)
Game Programming Patterns
Google's C++ Style Guide
Hands-On System Programming with C++ - Dr. Rian Quinn (Packt account required)
How to make an Operating System - Samy Pesse
How To Think Like a Computer Scientist: C++ Version - Allen B. Downey
Introduction to Design Patterns in C++ with Qt 4 - Alan Ezust, Paul Ezust (PDF)
Joint Strike Fighter, C++ Coding Standards, by Bjarne Stroustrup (PDF)
LearnCpp.com (HTML)
Learning C++ eBook - Compiled from StackOverflow Documentation (PDF)
Matters Computational: Ideas, Algorithms, Source Code, by Jorg Arndt (PDF)
More C++ Idioms - Sumant Tambe and others, WikiBooks
Open Data Structures (In C++) - Pat Morin (PDF)
Programming Fundamentals - A Modular Structured Approach using C++ - Kenneth Leroy Busbee (PDF)
Software Design Using C++ - Br. David Carlson and Br. Isidore Minerd
Software optimization resources by Agner Fog
The Boost C++ libraries - Boris Schäling (HTML)
The Rook's Guide to C++ - Jeremy Hansen (PDF)
The Ultimate Question of Programming, Refactoring, and Everything
Think C++: How To Think Like a Computer Scientist - Allen B. Downey (PDF)
Thinking in C++, Second Edition, Vol. 1. - Bruce Eckel (Vol. 2)
Working Draft, Standard for Programming Language C++, 2021 Revision - Thomas Köppe (PDF) (🚧 in process)

Chapel

Cilk

Cilk 5.4.6 Reference Manual (PDF)

Clojure

A Brief Beginner’s Guide To Clojure
Clojure - Functional Programming for the JVM - R. Mark Volkmann
Clojure by Example - Hirokuni Kim
Clojure community-driven documentation
Clojure Cookbook
Clojure Distilled Beginner Guide
Clojure for the Brave and True
Clojure in Small Pieces - Rich Hickey, Timothy Daly (PDF) (🗃️ unglued)
Clojure Koans
Clojure Programming - Wikibooks
ClojureScript Koans
ClojureScript Unraveled (HTML)
Data Sorcery with Clojure
Modern cljs
SICP Distilled - An idiosyncratic tour of SICP in Clojure
The Clojure Style Guide

CMake

An Introduction to Modern CMake - Henry Schreiner (HTML)
CMake Tutorial (HTML)
Quick CMake tutorial (HTML)

COBOL

CoffeeScript

CoffeeScript Cookbook
CoffeeScript Ristretto - Reginald Braithwaite (Leanpub account or valid email requested)
Hard Rock CoffeeScript - Alex Chaplinsky (gitbook)
Smooth CoffeeScript
The Little Book on CoffeeScript - Alex MacCaw, David Griffiths, Satoshi Murakami, Jeremy Ashkenas

ColdFusion

CFML In 100 Minutes - J. Casimir
Learn CF in a Week

Component Pascal

Computing Fundamentals - Stan Warford (PDF)

Cool

CoolAid: The Cool 2013 Reference Manual (PDF)

Coq

Crystal

Crystal for Rubyists

CUDA

CUDA C Best Practices Guide (PDF)
CUDA C Programming Guide (PDF)
OpenCL Programming Guide for CUDA Architecture (PDF)

D

Dart

Essential Dart - Krzysztof Kowalczyk and StackOverflow Contributors
Learning Dart - Compiled from StackOverflow documentation (PDF)

DB2

Getting started with DB2 Express-C (PDF)
Getting started with IBM Data Studio for DB2 (PDF)
Getting started with IBM DB2 development (PDF)

DBMS

Database Management Systems eBooks For All Edition (PDF)

Delphi / Pascal

Essential Pascal Version 1 and 2 - M. Cantù
Expert Delphi - Paweł Głowacki (Packt account required)
Modern Object Pascal Introduction for Programmers - Michalis Kamburelis (AsciiDoc, HTML, PDF)

DTrace

IllumOS Dynamic Tracing Guide

Eiffel

A Functional Pattern System for Object-Oriented Design - Thomas Kuhne (PDF)

Elixir

30 Days of Elixir - Tim Morgan (HTML)
Elixir School (HTML)
Elixir Succinctly, Syncfusion (PDF, Kindle) (email address requested, not required)
Getting Started Guide (HTML) (PDF, MOBI, EPUB)
Joy of Elixir - Ryan Bigg (HTML) - Source (🚧 in process)
Learning Elixir - Joseph Kain Blog (HTML)
The Ultimate Guide To Elixir For Object-Oriented Programmers - Bruce Park (HTML)

Ecto

Ecto Getting Started Guide (HTML)
The Little Ecto Cookbook - José Valim, Dashbit (PDF) (email address required)

Phoenix

Phoenix Framework Guide (HTML)
Versioned APIs with Phoenix - Elvio Vicosa (PDF)

Emacs

Embedded Systems

Control and Embedded Systems (HTML)
Discovering the STM32 Microcontroller (PDF)
First Steps with Embedded Systems - Byte Craft Limited (PDF)
Introduction to Embedded Systems, Second Edition - Edward Ashford Lee, Sanjit Arunkumar Seshia (PDF)
Introduction to Microcontrollers (HTML)
Mastering the FreeRTOS Real Time Kernel - a Hands On Tutorial Guide - freertos.org (PDF)

Erlang

BEAM Wisdoms (HTML)
Concurrent Programming in ERLANG (PDF)
Erlang Handbook (PDF)
Erlang Programming - Wikibooks (HTML)
Getting Started with Erlang User's Guide (HTML)
Learn You Some Erlang For Great Good - Frederic Trottier-Hebert
Making reliable distributed systems in the presence of software errors - Joe Armstrong (PDF)
Stuff Goes Bad: Erlang in Anger - Fred Herbert (PDF)
The BEAM Book (HTML)

ESP8266

Kolban's book on the ESP32 & ESP8266 (Leanpub account or valid email requested)

F Sharp

Analyzing and Visualizing Data with F# - Tomas Petricek (PDF) (🗃️ archived)
F# for fun and profit (ePub)
F# Programming - Wikibooks
F# Succinctly, SyncFusion (PDF, Kindle) (email address requested, not required)
Functional Programming Textbook - Yusuf M Motara (PDF)
Programming Language Concepts for Software Developers

Firefox OS

Quick Guide For Firefox OS App Development: Creating HTML5 based apps for Firefox OS - Andre Garzia

Flutter

Cookbook
Flutter in Action Eric Windmill
Flutter Succinctly, Syncfusion (PDF, Kindle) (email address requested, not required)
Flutter Tutorial - Tutorials Point
Flutter Tutorials Handbook
Flutter UI Succinctly, Syncfusion - Ed Freitas

Force.com

Apex Workbook (PDF)
Developer Workbooks
Force.com Fundamentals (PDF)
Force.com Platform Fundamentals: An Introduction to Custom Application Development in the Cloud
Force.com Workbook (PDF)
Heroku Postgres (PDF)
Heroku Workbook (PDF)
Integration Workbook (PDF)
Salesforce1 Mobile App Workbook (PDF)
Visualforce Workbook (PDF)

Forth

A Beginner's Guide to Forth - J.V. Noble
And so Forth... (PDF)
Easy Forth - Nick Morgan (HTML)
Programming Forth (PDF)
Starting Forth
Thinking Forth
Thoughtful Programming and Forth

Fortran

Fortran 90 Tutorial - C.-K. Shene at Michigan Technological University (HTML)
Fortran 90 Tutorial - Sarah T. Whitlock, Paul H. Hargrove at Stanford University (HTML)
Fortran information & resources - fortranplus.co.uk (HTML)
FORTRAN Performance Tuning co-Guide (1998) - Timothy C. Prince (HTML)
Introduction to Fortran - Sebastian Ehlert, Julius Stückrath, Marcel Mueller, Marcel Stahn (HTML)
Modern Fortran in Science and Technology - Jonas Lindemann and Ola Dahlblom (HTML, PDF, EPUB)
Modern Fortran Tutorial - Yutaka Masuda (HTML)
Professional Programmer’s Guide to Fortran77 (2005) - Clive G. Page (PDF)
Self Study Guide 2: Programming in Fortran 95 - Dr Rachael Padman (PDF)
User Notes On Fortran Programming (UNFP): An open cooperative practical guide (1998) - Abraham Agay, Arne Vajhoej et. al (HTML)

FreeBSD

Books and Articles from FreeBSD Site
The Complete FreeBSD
Using C on the UNIX System - David A. Curry

Git

A git Primer - Daniel Miessler
A Visual Git Reference - Mark Lodato
Conversational Git
git - the simple guide
Git for Computer Scientists
Git From The Bottom Up - J. Wiegley
Git Immersion
Git In The Trenches
Git internals - Scott Chacon (PDF)
Git Magic
Git Notes for Professionals - Compiled from StackOverflow Documentation (PDF)
Git Pocket Guide - Richard E. Silverman
Git Reference
Git Succinctly, Syncfusion (PDF, Kindle) (email address requested, not required)
Git-Tutorial For-Beginners - HubSpot Product Team
Git Workflows - Yan Pritzker (🗃️ archived)
Happy Git and GitHub for the useR - Jenny Bryan
How to Collaborate on Github - André J
Introduction to Git and Github - Launch School
Introduction to Git and Github - Tutorial - Dr. Chris Bourke (PDF)
Introduction to Git and GitHub eBook - Bobby Iliev (Markdown, PDF)
Learn Git - Learn Version Control with Git - Tobias Günther
Pro Git - Scott Chacon
Pro Git Reedited - Jon Forrest
Ry's Git Tutorial - Ryan Hodson
Think Like (a) Git: A Guide for the Perplexed

Go

An Introduction to Programming in Go
Build Web Application with Golang
Building Web Apps with Go
Darker Corners of Go - Rytis Bieliunas
Effective Go
Go 101 - @TapirLiu
Go Bootcamp - Matt Aimonetti
Go by Example
Go for Javascript Developers
Go for Python Programmers - Jason McVetta (HTML, PDF, EPUB)
Go Succinctly - Mark Lewin (PDF, EPUB, Kindle)
Go Web Development Succinctly - Mark Lewin (PDF, EPUB, Kindle)
How To Code in Go - Mark Bates, Cory Lanou, and Timothy J. Raymond (PDF, EPUB)
Learn Go with Tests
Learning Go
Let's learn Go!
Practical Cryptography With Go - Kyle Isom
Practical Go Lessons - Maximilien Andile
The Go Tutorial
The Little Go Book - Karl Seguin (PDF, ePUB)
Web apps in Go, the anti textbook

GraphQL

Fullstack GraphQL
Learning graphqL (PDF)

Groovy

Gradle

Building Java Projects with Gradle
Gradle Succinctly - José Roberto Olivas Mendoza
Gradle User Guide - Hans Dockter, Adam Murdoch (PDF)

Grails

Getting Started with Grails
Grails Tutorial for Beginners - grails.asia (🗃️ archived)
The Grails Framework - Reference Documentation - Graeme Rocher, Peter Ledbrook, Marc Palmer, Jeff Brown, Luke Daley, Burt Beckwith, Lari Hotari (PDF)

Spock Framework

Spock Framework Reference Documentation - Peter Niederwieser

Hack

Hack Documentation

Hadoop

Big Data Analytics with Hadoop 3 - Sridhar Alla (Packt account required)
Cloudera Impala - John Russel (PDF)
Data-Intensive Text Processing with MapReduce (Jimmy Lin and Chris Dyer) (PDF)
Hadoop for Windows Succinctly - Dave Vickers
Hadoop Illuminated - Mark Kerzner & Sujee Maniyam

Haskell

A Gentle Introduction to Haskell Version 98 - Paul Hudak, John Peterson, Joseph Fasel
Anatomy of Programming Languages - William R. Cook
Beautiful Code, Compelling Evidence - J.R. Heard (PDF)
Developing Web Applications with Haskell and Yesod - Michael Snoyman
Exploring Generic Haskell - Andres Löh (PDF)
Happy Learn Haskell Tutorial
Haskell - Wikibooks
Haskell no panic - Conrad Barski
Haskell Notes for Professionals - Compiled from StackOverflow documentation (PDF)
Haskell web Programming (Yesod tutorial)
Learn Haskell Fast and Hard - Yann Esposito
Learn You a Haskell for Great Good - Miran Lipovaca
Parallel and Concurrent Programming in Haskell - Simon Marlow
Real World Haskell - Bryan O'Sullivan, Don Stewart, and John Goerzen
Speeding Through Haskell - Arya Popescu
The Haskell Road to Logic, Math and Programming - Kees Doets and Jan van Eijck (PDF)
The Haskell School of Music - From Signals to Symphonies - Paul Hudak (PDF)
What I Wish I Knew When Learning Haskell - Stephen Diehl (PDF)
Wise Man's Haskell - Andre Popovitch
Yet Another Haskell Tutorial - Hal Daum ́e III (PDF)

Haxe

Flambe Handbook
Haxe and JavaScript - Matthijs Kamstra (wikibook)
Haxe Manual - Haxe Foundation (PDF, HTML)
HaxeFlixel Handbook (HTML)
Kha Handbook

HTML / CSS

A beginner's guide to HTML&CSS
A free guide to learn HTML and CSS
Adaptive Web Design - Aaron Gustafson
Airbnb CSS / Sass Styleguide - Airbnb
Airbnb CSS-in-JavaScript Style Guide - Airbnb
An advanced guide to HTML&CSS
Atomic Design - Brad Frost
Canvassing
Code Guide: Standards for developing flexible, durable, and sustainable HTML and CSS - Mark Otto
CSS Animation 101
CSS Notes for Professionals - Compiled from StackOverflow Documentation (PDF)
Dive Into HTML5 - Mark Pilgrim (PDF)
DOM Enlightenment - Cody Lindley (HTML)
GA Dash
Google's HTML/CSS Style Guide
How To Build a Website with HTML - Erin Glass (PDF, EPUB)
How to Code in HTML5 and CSS3 - Damian Wielgosik (PDF)
HTML Canvas Deep Dive - Josh Marinacci
HTML Dog Tutorials
HTML5 Canvas - Steve Fulton & Jeff Fulton
HTML5 Canvas Notes for Professionals - Compiled from StackOverflow documentation (PDF)
HTML5 for Publishers - Sanders Kleinfeld
HTML5 For Web Designers - Jeremy Keith
HTML5 Notes for Professionals - Compiled from StackOverflow documentation (PDF)
HTML5 Quick Learning Guide - HTML5Templates (PDF)
HTML5 Shoot 'em Up in an Afternoon - Bryan Bibat (HTML)
Interneting is Hard (But it Doesn't Have to Be) - Oliver James
Learn CSS Layout
Learn CSS Layout the pedantic way
Learn to Code HTML & CSS - Shay Howe
Magic of CSS - Adam Schwartz (HTML) (🚧 in process)
MaintainableCSS
Pocket Guide to Writing SVG - Joni Trythall
Pro HTML5 Programming - Jen Simmons, Chris O'Connor, Dylan Wooters, Peter Lubbers
Resilient Web Design - Jeremy Keith
RTL Styling 101 - Ahmad Shadeed
Scalable and Modular Architecture for CSS - Jonathan Snook
The CSS Handbook - Flavio Copes (PDF, EPUB, Kindle) (email address requested)
The HTML Handbook - Flavio Copes (PDF, EPUB, Kindle) (email address requested)
Understanding Flexbox: Everything you need to know - Ohans Emmanuel
W3.CSS Succinctly - Joseph D. Booth
Web Audio API - Boris Smus
Web Visual Effects with CSS3 - Thomas Mak

Bootstrap

Twitter Bootstrap 3 Succinctly - Peter Shaw
Twitter Bootstrap 4 Succinctly - Peter Shaw
Twitter Bootstrap Succinctly - Peter Shaw

Idris

Gentle Introduction to Dependent Types with Idris - Boro Sitnikovski (Leanpub account or valid email requested)

Icon

The Implementation of the Icon Programming Language

iOS

Cocoa Dev Central
iOS Developer Notes for Professionals - Compiled from StackOverflow Documentation (PDF)
iOS Succinctly, Syncfusion (PDF, Kindle) (email address requested, not required)
NSHipster (Resource)
Start Developing iOS Apps (Swift) (HTML)
Start Developing iOS Apps Today (Objective-C) - Last updated 22.10.2013 (PDF)

IoT

IoT in five days- V1.1 (PDF, EPUB)
Mastering Internet of Things - Peter Waher (Packt account required)

Isabelle/HOL

J

Arithmetic by Kenneth E Iverson (PDF)
Brief Reference by Chris Burke and Clifford Reiter (PDF)
Calculus by Kenneth E Iverson (PDF)
Computers and Mathematical Notation by Kenneth E Iverson
Concrete Math Companion by Kenneth E Iverson (PDF)
Easy J by Linda Alvord, Norman Thomson (PDF) (Word DOC)
Exploring Math by Kenneth E Iverson (PDF)
J for C Programmers by Henry Rich
J Primer
Learning J by Roger Stokes- online
Math for the Layman by Kenneth E Iverson (zipped html+images)

Java

3D Programming in Java - Daniel Selman (PDF)
Apache Jakarta Commons: Reusable Java Components - Will Iverson (PDF)
Artificial Intelligence - Foundations of Computational Agents, Second Edition - David L. Poole and Alan K. Mackworth
Building Back-End Web Apps with Java, JPA and JSF - Mircea Diaconescu, Gerd Wagner (HTML,PDF)
Category wise tutorials - J2EE - Yong Mook Kim
Core Servlets and JavaServer Pages, 2nd Ed. (2003) - Marty Hall and Larry Brown (🗃️ archived)
Data Structures in Java for the Principled Programmer (2007) - Duane A. Bailey (PDF)
Google's Java Style Guide
Introduction to Computer Science "booksite" - by Robert Sedgewick and Kevin Wayne (HTML)
Introduction to Computer science using Java - Bradley Kjell
Introduction to Programming in Java - Robert Sedgewick and Kevin Wayne
Introduction to Programming Using Java - David J. Eck (HTML, PDF, ePUB + exercises)
Introduction to Programming Using Java (5th Edition - final version, 2010 Jun) - David J. Eck (HTML, PDF, ePUB + exercises)
Java Application Development on Linux (2005) - Carl Albing and Michael Schwarz (PDF)
Java, Java, Java Object-Oriented Problem Solving - R. Morelli and R.Walde
Java Language and Virtual Machine Specifications - James Gosling, et al
Java Notes for Professionals - Compiled from StackOverflow documentation (PDF)
Java Programming - Wikibooks
Java Programming for Kids - Yakov Fain
Java Projects, Second Edition - Peter Verhas (Packt account required)
Learning Java Language - Compiled from StackOverflow Documentation (PDF)
Microservices Best Practices for Java (PDF)
Object-Oriented Programming in JavaTM Textbook - Rick Halterman (PDF per Chapter)
OOP - Learn Object Oriented Thinking & Programming - Rudolf Pecinovsky (PDF)
Open Data Structures (in Java) - Pat Morin (PDF)
Playing with Java Microservices on Kubernetes and OpenShift - Nebrass Lamouchi (Leanpub account or valid email requested)
Processing XML with Java (A Guide to SAX, DOM, JDOM, JAXP, and TrAX) (2002) - Elliotte Rusty Harold
The Java EE6 Tutorial (PDF)
The Java EE7 Tutorial - Eric Jendrock, et al (PDF)
The Java Tutorials
The Java Web Scraping Handbook - Kevin Sahin (PDF, HTML)
Think Data Structures: Algorithms and Information Retrieval in Java - Allen B. Downey (PDF, HTML)
Think Java: How to Think Like a Computer Scientist, 2nd Edition - Allen B. Downey and Chris Mayfield (HTML, PDF) (Interactive version by Trinket)
- Think Java: How to Think Like a Computer Scientist - Allen B. Downey and Chris Mayfield (HTML, PDF) (Interactive version by Trinket)
Using RxJava 2 Tutorial - Lars Vogel, Simon Scholz (HTML)
Welcome to Java for Python Programmers - Brad Miller
Welcome to the Java Workshop (2006) - Trevor Miller
What’s New in Java 8 - Adam L. Davis
Writing Advanced Applications for the Java 2 Platform - Calvin Austin and Monica Pawlan (PDF)

Codename One

Codename One Developer Guide (PDF)
Create an Uber Clone in 7 Days (first 2 chapters) - Shai Almog (PDF)

Java Reporting

The ABC of PDF with iText: PDF Syntax essentials - Bruno Lowagie (Leanpub account or valid email requested)
The JasperReports Ultimate Guide, Third Edition (PDF)

Solidity

Spring

Building Applications with Spring 5 and Vue.js 2 - James J. Ye (Packt account required)
Software Architecture with Spring 5.0 - René Enríquez, Alberto Salazar (Packt account required)
Spring Framework Cookbook: Hot Recipes for Spring Framework - JCGs (Java Code Geeks) (PDF)
Spring Framework Notes for Professionals - Compiled from StackOverflow documentation (PDF)
Spring Framework Reference Documentation - Rod Johnson et al.

Spring Boot

Building modern Web Apps with Spring Boot and Vaadin (PDF)
Spring Boot Reference Guide - Phillip Webb et al. (PDF)

Spring Data

Spring Data Reference - Oliver Gierke, Thomas Darimont, Christoph Strobl, Mark Paluch, Jay Bryant

Spring Security

Spring Security Reference - Ben Alex, Luke Taylor, Rob Winch

Wicket

Official Free Online Guide for Apache Wicket framework

JavaScript

Airbnb JavaScript Style Guide() { - Airbnb (HTML)
Basic JavaScript for the impatient programmer - Dr. Axel Rauschmayer (HTML)
Book of Modern Frontend Tooling - Various (HTML)
Building Front-End Web Apps with Plain JavaScript - Gerd Wagner (HTML,PDF)
Clean Code JavaScript - Ryan McDermott (HTML)
Crockford's JavaScript - Douglas Crockford (HTML)
Deep JavaScript: Theory and techniques - Dr. Axel Rauschmayer (HTML)
Designing Scalable JavaScript Applications - Emmit Scott (PDF+livebook)
Dev Docs - Various (HTML)
Eloquent JavaScript 3rd edition - Marijn Haverbeke (HTML, PDF, EPUB, MOBI)
Exploring ES6 - Dr. Axel Rauschmayer (HTML)
Google JavaScript Style Guide - Aaron Whyte, Bob Jervis, Dan Pupius, Erik Arvidsson, Fritz Schneider, & Robby Walker (HTML)
Human JavaScript - Henrik Joreteg (HTML)
JavaScript Allongé - Reginald Braithwaite (HTML)
JavaScript Bible - Danny Goodman (PDF)
JavaScript Challenges Book - Tomás Corral Casas (HTML)
JavaScript Enlightenment - Cody Lindley (HTML)
JavaScript ES6 and beyond - Alberto Montalesi (PDF, epub)
JavaScript For Cats - Maxwell Ogden (HTML)
JavaScript for Impatient Programmers (ES2020 edition) - Dr. Axel Rauschmayer (HTML)
JavaScript from ES5 to ESNext - Flavio Copes (PDF, EPUB, Kindle) (email address requested)
JavaScript Fundamentals, Plus a Dash Of JQuery - for dinner ladies - Nicholas Johnson (HTML)
JavaScript Garden Maintained by Tim Ruffles (HTML)
JavaScript Interview #35 - Coderslang Master (PDF, email address requested, not required)
JavaScript Notes for Professionals - Compiled from StackOverflow documentation (PDF)
JavaScript Patterns Collection - Shi Chuan (HTML)
JavaScript Spessore - Reginald Braithwaite (HTML)
JavaScript Succinctly - Cody Lindley (PDF, Kindle; email address requested, not required)
JavaScript the Right Way - William Oliveira & Allan Esquina (HTML)
jQuery Fundamentals - Bocoup (HTML)
JS Robots - Mark Daggett (PDF) (🗃️ archived)
Leaflet Tips and Tricks: Interactive Maps Made Easy - Malcolm Maclean (HTML)
Learning JavaScript Design Patterns - Addy Osmani (HTML)
Let's Learn ES6 - Ryan Christiani (Superbook format)
Managing Space and Time with JavaScript - Book 1: The Basics - Noel Rappin (dead link)
Marionette Exposé: Learn to write modular Javascript applications using Backbone Marionette and RequireJS/AMD - Jack Killilea (HTML, PDF, EPUB, MOBI; Leanpub account or valid email requested)
Mozilla Developer Network's JavaScript Guide - Mozilla Developer Network contributors (HTML)
Neural Networks with JavaScript Succinctly - James McCaffrey (PDF, EPUB, MOBI)
Oh My JS - Azat Mardanov (HTML)
Patterns For Large-Scale JavaScript Application Architecture - Addy Osmani (HTML)
Practical Modern JavaScript - Nicolas Bevacqua (HTML)
Professor Frisby’s Mostly Adequate Guide to Functional Programming - Brian Lonsdorf (HTML)
Robust Client-Side JavaScript - Matthias Schäfer (HTML, EPUB)
Single page apps in depth - Mixu (HTML)
Speaking JavaScript - Dr. Axel Rauschmayer
Standard ECMA-262 ECMAScript 2016 Language Specification - Ecma International (HTML,PDF)
The JavaScript Beginner's Handbook - Flavio Copes (PDF, EPUB, Kindle) (email address requested)
The JavaScript Tutorial - Ilya Kantor (HTML)
The JavaScript Way - Baptiste Pesquet
The Problem with Native JavaScript APIs - Nicholas C. Zakas (PDF, email address requested)
Thinking in JavaScript - Aravind Shenoy (Kindle)
Understanding ECMAScript 6 - Nicholas C. Zakas (HTML)
Understanding JavaScript OOP - Quil (HTML)
Understanding the DOM — Document Object Model - Tania Rascia (PDF, EPUB)
You Don't Know JS - Kyle Simpson (HTML, PDF, EPUB, MOBI)

AngularJS

ℹ️ See also … Angular

Angular 1 Style Guide - John Papa (HTML)
Angular for the jQuery developer - ng-newsletter, Ari Lerner, David Wu, Nate Murray (HTML)
AngularJS - Step by Logical Step - Nicholas Johnson (HTML)
AngularJS Guide (HTML)
AngularJS Material Designing (HTML)
AngularJS Notes for Professionals - Compiled from StackOverflow Documentation (PDF)
AngularJS Style Guide for teams - Todd Motto (HTML)
AngularJS Succinctly - Frederik Dietz (PDF, EPUB, Kindle) (email address requested, not required)
AngularJS Tutorial (HTML)
AngularJS vs EmberJs - Brendan Graetz (HTML, PDF, EBOOK, Kindle) (Leanpub account / email address not required)
Seven-Part Introduction to AngularJS - Keving Ngo (HTML, 📦 demos, open-sourced examples)
Unit Testing Best Practices in AngularJS - Andy Shora (HTML)

Aurelia

Beginning Aurelia - behzad (Leanpub account or valid email requested)

Backbone.js

A pragmatic guide to Backbone.js apps
Backbone Tutorials: Beginner, Intermediate and Advanced - Thomas Davis (Leanpub account or valid email requested)
Backbonejs Tutorials
Building Single Page Web Apps with Backbone.js (🚧 in process)
Developing Backbone.js Applications
Getting Started with Backbone.js
How to share Backbone.js models with node.js

Booty5.js

The Booty5 HTML5 Game Maker Manual

D3.js

Dojo

Dojo: The Definitive Guide - Matthew A. Russell

Electron

Electron Succinctly, Syncfusion (PDF, Kindle) (email address requested, not required)

Elm

An Introduction to Elm (HTML)
Beginning Elm - Pawan Poudel (HTML)
Building a Live-Validating Signup Form in Elm
Elm Accelerated - James Porter
Elm Programming Language (HTML)
Elm Tutorial
Learn You an Elm (HTML)
The Elm Architecture

Ember.js

AngularJs vs EmberJs - Brendan Graetz (HTML, PDF, EPUB, Kindle) (Leanpub account / email address not required)
DockYard Ember.js Style Guide
Ember App with RailsApi
Ember.js - Getting started
Vic Ramon's Ember Tutorial
yoember.com

Express.js

Express.js Guide - Azat Mardanov
The Express.js Handbook - Flavio Copes (HTML, PDF) (email required for PDF)

Fastify

Fastify - Latest Documentation (HTML)

Ionic

Ionic 4 Succinctly - Ed Freitas

jQuery

JavaScript Fundamentals, Plus a Dash Of JQuery - for dinner ladies
jQuery Notes for Professionals - Compiled from StackOverflow Documentation (PDF)
jQuery Novice to Ninja (PDF)
jQuery Succinctly, Syncfusion (PDF, Kindle) (email address requested, not required)

Meteor

Your First Meteor Application, A Complete Beginner’s Guide to the Meteor JavaScript Framework

Next.js

Mastering Next.js
The Next.js Handbook - Flavio Copes (HTML, PDF) (email required for PDF)

Node.js

An Introduction to libuv - Nikhil Marathe (PDF - ePub)
From Containers to Kubernetes with Node.js - Kathleen Juell (PDF, EPUB)
Full Stack JavaScript: Learn Backbone.js, Node.js and MongoDB - Azat Mardan
How To Code in Node.js - eBook - David Landup, Marcus Sanatan @ Stack Abuse, Digital Ocean (PDF, EPUB)
Introduction to Node.js (HTML)
Mastering Node - visionmedia (PDF)
Mixu's Node Book
Module Patterns - Pedro Teixeira (HTML, PDF, EPUB, Kindle) (Leanpub account or valid email requested)
Node Documentation
Node: Up and Running - Tom Hughes-Croucher
Node.js Notes for Professionals - Compiled from StackOverflow Documentation (PDF)
Node.js Succinctly, Syncfusion (PDF, Kindle) (email address requested, not required)
Practical Node.js: Building Real-World Scalable Web Apps - Azat Mardan
The Node Beginner Book
The Node.js Handbook - Flavio Copes (HTML, PDF) (email required for PDF)

Om

Om Tutorial

React

Airbnb React/JSX Style Guide - Airbnb
Full-Stack React Projects - Shama Hoque (Packt account required)
Hacking with React
How To Code in React.js - Joe Morgan
Intro to the React Framework
Learning React.js: Getting Started and Concepts
React-Bits
React Book, your beginner guide to React - Chris Noring
React Enlightenment
React In-depth: An exploration of UI development
React in patterns - Krasimir Tsonev
React JS Notes for Professionals - Compiled from StackOverflow Documentation (PDF)
React Primer Draft
React Succinctly - Samer Buna
React Tutorial
React Tutorial by Josh Finnie
- Part 1
- Part 2
- Part 3
React with ASP.NET Core Tutorial
React.js Tutorial: Now is Your Time to Try It, Right in Your Browser
SurviveJS - Webpack and React
The React Beginner's Handbook - Flavio Copes (PDF, EPUB, Kindle) (email address requested)

React Native

Programming React Native (Leanpub account or valid email requested)
React Native Animation Book
React Native Express
React Native Notes for Professionals - Compiled from StackOverflow documentation (PDF)
React Native Training

Redux

Full-Stack Redux Tutorial
SoundCloud Application in React + Redux
The Complete Redux Book - Boris Dinkevich and Ilya Gelman (Leanpub account or valid email requested)

Svelte

Svelte Tutorial - Svelte.dev
The Svelte Handbook - Flavio Copes (PDF, EPUB, Kindle) (email address requested)

Vue.js

30 Days Of Vue - Hassan Djirdeh (HTML; email required for PDF)
Learning Vue.js (PDF)
The Vue.js Handbook - Flavio Copes (PDF)

Jenkins

Jenkins: The Definitive Guide (PDF)
Jenkins User Handbook (PDF)

Julia

Introducing Julia - Wikibooks
Julia by Example - Samuel Colvin (GitHub repo)
Julia Data Science - Jose Storopoli, Rik Huijzer, and Lazaro Alonso
Julia language: a concise tutorial - Antonello Lobianco (GitBook)
Learn Julia in Y minutes - Leah Hanson
Quantitative Economics with Julia - Jesse Perla, Thomas J. Sargent and John Stachurski (HTML, PDF)
The Julia Express - Bogumił Kamiński (PDF)
Think Julia - Ben Lauwens and Allen Downey (GitBook)

Kotlin

Kotlin Notes for Professionals - Compiled from StackOverflow documentation (PDF)
Kotlin Official Documentation
Kotlin Quick Reference - Alvin Alexander (gitbook)
Learning Kotlin (PDF)

LaTeX / TeX

LaTeX

Arbitrary LaTex Reference
Begin Latex in minutes
LaTeX - Wikibooks
LaTex Notes for Professionals - Compiled from StackOverflow documentation (PDF)
The Not So Short Introduction to LaTeX (PDF)

TeX

Notes On Programming in TeX - Christian Feursänger (PDF)
TeX by Topic, A TeXnician's Reference - Victor Eijkhout
TeX for the Impatient - Paul Abrahams, Kathryn Hargreaves, and Karl Berry

Language Agnostic

BY SUBJECT This section has been moved to its own file.

Limbo

Inferno Programming With Limbo

Linux

Ad Hoc Data Analysis From The Unix Command Line - Wikibooks
Advanced Linux Programming (PDF)
Automated Linux From Scratch
Getting Started with Ubuntu
GNU Autoconf, Automake and Libtool
Hardened Linux From Scratch
Kali Linux 2018: Assuring Security by Penetration Testing, Fourth Edition - Shiva V. N Parasram, Alex Samm, Damian Boodoo, Gerard Johansen, Lee Allen, Tedi Heriyanto, Shakeel Ali (Packt account required)
Kali Linux: Professional Penetration-Testing Distribution
Learning Debian GNU/Linux
Linux 101 Hacks - Ramesh Natarajan (PDF)
Linux Advanced Routing & Traffic Control HOWTO
Linux Appliance Design: A Hands-On Guide to Building Linux Appliances - Bob Smith, John Hardin, Graham Phillips, Bill Pierce (PDF, EPUB, MOBI)
Linux commands Notes for Professionals - Compiled from StackOverflow documentation (PDF)
Linux Device Drivers, Third Edition - Jonathan Corbet, Alessandro Rubini, and Greg Kroah-Hartman
Linux from Scratch
Linux Fundamentals - Paul Cobbaut (PDF)
Linux Inside
Linux Kernel in a Nutshell
Linux Newbie Administrator Guide
Linux Succinctly, Syncfusion (PDF, Kindle) (email address requested, not required)
Secure Programming HOWTO - Creating Secure Software - D. A. Wheeler (HTML, PDF)
Ten Steps to Linux Survival: Bash for Windows People - Jim Lehmer
The Debian Administrator's Handbook
The Linux Command Line (PDF)
The Linux Commands Handbook - Flavio Copes (PDF, EPUB, Kindle) (email address requested)
The Linux Development Platform (PDF)
The Linux Kernel Module Programming Guide
The Linux System Administrator's Guide
Ubuntu Pocket Guide and Reference
Ubuntu Server Guide (PDF)
Understanding the Linux Virtual Memory Manager - Mel Gorman (HTML, PDF)
UNIX Systems Programming for SVR4 - David A. Curry
Upstart Intro, Cookbook and Best Practises
What Every Programmer Should Know About Memory (PDF)

Lisp

Basic Lisp Techniques - David J. Cooper, Jr. (PDF)
Casting Spels in Lisp
Common Lisp: A Gentle Introduction to Symbolic Computation - David S. Touretzky (PDF, PS)
Common Lisp: An Interactive Approach - Stuart C. Shapiro
Common Lisp Quick Reference
Common Lisp the Language, 2nd Edition
Google's Common Lisp Style Guide
Interpreting LISP - Gary D. Knott (PDF)
Learn Lisp The Hard Way - Colin J.E. Lupton
Let Over Lambda - 50 Years of Lisp - D. Hoyte
Lisp for the Web - Adam Tornhill (PDF, EPUB, MOBI) (Leanpub account or valid email requested)
Lisp Hackers: Interviews with 100x More Productive Programmers - Vsevolod Dyomkin
Lisp Koans
Lisp Web Tales - Pavel Penev (Leanpub account or valid email requested)
Loving Common Lisp, or the Savvy Programmer's Secret Weapon - Mark Watson (PDF, EPUB, MOBI) (Leanpub account or valid email requested)
On Lisp - P. Graham
Paradigms of Artificial Intelligence Programming: Case Studies in Common Lisp - Peter Norvig (PDF, epub, markdown)
Practical Common Lisp - P. Seibel
The Common Lisp Cookbook
The Evolution of Lisp - Guy L. Steele Jr., Richard P. Gabriel (PDF)

Livecode

LiveCode userguide (PDF)

Lua

Make

Makefile tutorial - Chase Lambert
Managing Projects with GNU Make - Robert Mecklenburg

Markdown

Learn Markdown - Sammy P., Aaron O. (PDF) (EPUB) (MOBI)

Mathematica

MATLAB

An Interactive Introduction to MATLAB (PDF)
An Introduction to MATLAB (PDF)
Applications of MATLAB in Science and Engineering
Experiments with MATLAB
Freshman Engineering Problem Solving with MATLAB (PDF)
Interactive Tutorials for MATLAB, Simulink, Signal Processing, Controls, and Computational Mathematics
Introduction to MATLAB for Engineering Students - David Houcque (PDF) (1.2, 2005)
MATLAB - A Fundamental Tool for Scientific Computing and Engineering Applications - Volume 1
MATLAB - A Ubiquitous Tool for the Practical Engineer
MATLAB for Engineers: Applications in Control, Electrical Engineering, IT and Robotics
MATLAB Notes for professionals - Compiled from StackOverflow documentation (PDF)
MATLAB Programming - Wikibooks
MATLAB Succinctly, Syncfusion (PDF, Kindle) (email address requested, not required)
Numerical Computing with MATLAB
Physical Modeling in MATLAB - Alan B. Downey
Scientific Computing - Jeffrey R. Chasnov (PDF)

Maven

Mercurial

Hg Init: a Mercurial Tutorial - Joel Spolsky
Mercurial: The Definitive Guide
Mercurial: The Definitive Guide 2nd edition

Mercury

The Mercury Users' Guide (PDF)

Modelica

Modelica by Example

MongoDB

Introduction to MongoDB - Tutorials Point
Learning MongoDB - Based on Unaffiliated Stack Overflow Documentation (PDF)
MongoDB Koans
MongoDB Notes for Professionals - Compiled from StackOverflow Documentation (PDF)
MongoDB Succinctly, Syncfusion (PDF, Kindle) (email address requested, not required)
The Little MongoDB Book

MySQL

MySQL 8.0 Tutorial Excerpt (HTML) (PDF)
MySQL Notes for Professionals - Compiled from StackOverflow Documentation (PDF)

Neo4J

Fullstack GraphQL Applications with GRANDStack – Essential Excerpts - William Lyon (PDF) (email requested)
Graph Algorithms: Practical Examples in Apache Spark and Neo4j - Mark Needham and Amy E. Hodler (PDF, EPUB, MOBI) (email requested)
Graph Databases 2nd edition - Ian Robinson, Jim Webber and Emil Eifrém (PDF, EPUB, MOBI) (email requested)
Graph Databases For Dummies - Dr. Jim Webber and Rik Van Bruggen (PDF) (email requested)

.NET Core

Clean Code .NET
Entity Framework Core Succinctly - Ricardo Peres
.NET documentation - Microsoft Docs
Using .NET Core, Docker, and Kubernetes Succinctly - Michele Aponte

.NET Framework

Akka.NET Succinctly - Zoran Maksimovic
Application Security in .NET Succinctly - Stan Drapkin
Cryptography in .NET Succinctly - Dirk Strauss
Entity Framework
Game Creation with XNA - Wikibooks
Getting the Most from LINQPad Succinctly - José Roberto Olivas Mendoza
MonoGame Succinctly - Jim Perry
.NET for Visual FoxPro Developers
.NET Framework Notes for Professionals - Compiled from StackOverflow Documentation (PDF)
.NET Performance Testing and Optimization - The Complete Guide - Paul Glavich, Chris Farrell (PDF)
NuGet In-House Succinctly - José Roberto Olivas Mendoza
Rider Succinctly - Dmitri Nesteruk
Under the Hood of .NET Memory Management - Chris Farrell, Nick Harrison (PDF)
Visual Studio .NET Tips and Tricks (VS 2003-2005 only)
Visual Studio 2019 Succinctly - Alessandro Del Sole

Nim

Computer Programming with the Nim Programming Language - Dr. Stefan Salewski
Nim Basics - narimiran
Nim by Example - Flaviu Tamas
Nim Days - Ahmed Thabet

NoSQL

CouchDB: The Definitive Guide
Extracting Data from NoSQL Databases: A Step towards Interactive Visual Analysis of NoSQL Data - Petter Nasholm (PDF)
Graph Databases
How To Manage a Redis Database - Mark Drake (PDF, EPUB)
NoSQL Databases - Christof Strauch (PDF)
Redis in Action - Josiah L. Carlson
The Little Redis Book - K. Seguin (PDF, Epub)

Oberon

Algorithms and Data-Structures - Niklaus Wirth (PDF)
Object-Oriented Programming in Oberon-2 - Hanspeter Mössenböck (PDF)
Programming in Oberon - Niklaus Wirth (PDF)

Objective-C

Google's Objective-C Style Guide
Object-Oriented Programming with Objective-C
Objective-C Notes for Professionals - Compiled from StackOverflow Documentation (PDF)
Objective-C Succinctly, Syncfusion (PDF, Kindle) (email address requested, not required)
Programming With Objective-C

OCaml

Developing Applications With Objective Caml
Functional Programming in OCaml - Michael R. Clarkson
OCaml From the Ground Up - Daniil Baturin (HTML) (🚧 in process)
OCaml Scientific Computing - Liang Wang, Jianxin Zhao (HTML) (🚧 in process)
Real World OCaml
Think OCaml - Allen B. Downey and Nicholas Monje
Unix System Programming in OCaml Github Repo
Using, Understanding, and Unraveling The OCaml Language: From Practice to Theory and vice versa - Didier Rémy

Octave

Octave Programming - Wikibooks

OpenMP

OpenResty

Programming OpenResty

OpenSCAD

OpenSCAD User Manual - Wikibooks

TrueOS

TrueOS® Users Handbook

Perl

Beginning Perl
Data Munging with Perl (PDF)
Embedding Perl in HTML with Mason - D. Rolsky, K. Williams
Essential Perl (PDF)
Exploring Programming Language Architecture in Perl
Extreme Perl - R. Nagier (HTML, PDF)
Higher-Order Perl - M. J. Dominus (PDF)
Impatient Perl
Learning Perl The Hard Way
Modern Perl 5
Perl & LWP
Perl 5 Internals
Perl for the Web - C. Radcliff
Perl Notes for Professionals - Compiled from StackOverflow Documentation (PDF)
Perl one-liners cookbook - Sundeep Agarwal
Perl Training Australia - Course Notes
Plack Handbook
SDL::Manual Writing Games in Perl
Template Toolkit Documentation
The DBIx-Class Book
The PDL Book (PDF)
Web Client Programming with Perl

PHP

Clean Code PHP
PHP 5 Power Programming (PDF)
PHP Apprentice - Andrew Davis (🚧 in process)
PHP Best Practices
PHP Documentor - Documentation - phpdoc.org
PHP Internals Book
PHP Notes for Professionals - Compiled from StackOverflow Documentation (PDF)
PHP Pandas - Dayle Rees
PHP Programming - Wikibooks
PHP Reference: Beginner to Intermediate PHP5 - Mario Lurig (PDF)
PHP Security Guide
PHP: The Right Way
PHPUnit Manual - Sebastian Bergmann (PDF)
Practical PHP Programming
Practical PHP Testing
Survive The Deep End: PHP Security
Using Libsodium in PHP Projects

CakePHP

CakePHP Cookbook 2.x (PDF)

CodeIgniter

Drupal

The Tiny Book of Rules (PDF)

Laravel

100 (and counting) Laravel Quick Tips - Povilas Korop / LaravelDaily Team (PDF)
Laravel 5.x Official Documentation. Synced Daily (Leanpub account or valid email requested)
Laravel Best Practices
Laravel: Code Bright - Dayle Rees
Laravel: Code Happy - Dayle Rees
Laravel: Code Smart - Dayle Rees
Laravel Collections Unraveled - Jeffrey Madsen (Leanpub account or valid email requested)

Symfony

Zend

Using Zend Framework 3

PicoLisp

PostgreSQL

Postgres Official Documentation
Postgres Succinctly (PDF, Kindle) (email address requested, not required)
PostgreSQL Notes for Professionals - Compiled from StackOverflow documentation (PDF)
PostgreSQL Tutorial - Tutorials Point
Practical PostgreSQL
The Internals of PostgreSQL for database administrators and system developers

PowerShell

A Unix Person's Guide to PowerShell - The DevOps Collective, Inc. (PDF, ePub, MOBI, HTML) (Leanpub account or valid email requested)
Creating HTML Reports in PowerShell - The DevOps Collective, Inc. (PDF, ePub, MOBI, HTML) (Leanpub account or valid email requested)
DevOps: The Ops Perspective - The DevOps Collective, Inc. (PDF, ePub, MOBI, HTML) (Leanpub account or valid email requested)
Ditch Excel: Making Historical & Trend Reports in PowerShell - The DevOps Collective, Inc. (PDF, ePub, MOBI, HTML) (Leanpub account or valid email requested)
Layman’s Guide to PowerShell 2.0 remoting (PDF)
Learn PowerShell Core 6.0 - David das Neves, Jan-Hendrik Peters (Packt account required)
Learn PowerShell in Y Minutes
Mastering PowerShell v2
PowerShell 101: The No-Nonsense Beginner’s Guide to PowerShell - Mike F. Robbins (Leanpub account or valid email requested)
PowerShell 2.0 – One CMDLET At A Time (PDF)
PowerShell Notes for Professionals - Compiled from StackOverflow documentation (PDF)
PowerShell Succinctly, Syncfusion (PDF, Kindle) (email address requested, not required)
PowerShell Tips to Write By - Adam Bertram (Leanpub account or valid email requested) (🚧 in process)
Secrets of PowerShell Remoting - The DevOps Collective, Inc. (PDF, ePub, MOBI, HTML) (Leanpub account or valid email requested)
The Big Book of PowerShell Error Handling - The DevOps Collective, Inc. (PDF, ePub, MOBI, HTML) (Leanpub account or valid email requested)
The Big Book of PowerShell Gotchas - The DevOps Collective, Inc. (PDF, ePub, MOBI, HTML) (Leanpub account or valid email requested)
The Monad Manifesto - Annotated - The DevOps Collective, Inc. (PDF, ePub, MOBI, HTML) (Leanpub account or valid email requested)
The PowerShell + DevOps Global Summit Manual for Summiteers - The DevOps Collective, Inc. (PDF, ePub, MOBI, HTML) (Leanpub account or valid email requested)
Why PowerShell? - The DevOps Collective, Inc. (PDF, ePub, MOBI, HTML) (Leanpub account or valid email requested)
Windows PowerShell Networking Guide - The DevOps Collective, Inc. (PDF, ePub, MOBI, HTML) (Leanpub account or valid email requested)

Processing

The Nature of Code: Simulating Natural Systems with Processing

Prolog

Adventure in Prolog - Dennis Merritt
Coding Guidelines for Prolog - Michael A. Covington, Roberto Bagnara, Richard A. O'Keefe, Jan Wielemaker, Simon Price
Concise Intro to Prolog - David Matuszek
Expert Systems in Prolog - David Matuszek
GNU Prolog Manual - Daniel Diaz (PDF)
Introduction to Prolog for Mathematicians - J. Ireson-Ireson-Paine
Learn Prolog Now!
Logic, Programming and Prolog (2ed) - Ulf Nilsson and Jan Maluszynski
Natural Language Processing Techniques in Prolog - P. Blackburn, K. Striegnitz
Prolog and Natural - Language Analysis - Fernando C. N. Pereira, Stuart M. Shieber
Prolog for Programmers - Feliks Kluźniak, Stanisław Szpakowicz & Janusz S. Bień
Prolog Problems - Werner Hett
Prolog Tutorial - J. R. Fisher
Simply Logical: Intelligent Reasoning by Example - Peter Flach
The Art of Prolog, Second Edition - Leon S. Sterling, Ehud Y. Shapiro (Open Access)
The First 10 Prolog Programming Contests - Bart Demoen, Phuong-Lan Nguyen, Tom Schrijvers, Remko Tronçon
The Power of Prolog - Markus Triska
Warren's Abstract Machine: A Tutorial Reconstruction - Hassan A¨it-Kaci

Constraint Logic Programming (extended Prolog)

A Gentle Guide to Constraint Logic Programming via ECLiPSe

PureScript

PureScript By Example - Phil Freeman

Python

100 Page Python Intro - Sundeep Agarwal
20 Python Libraries You Aren't Using (But Should) - Caleb Hattingh
A Beginner's Python Tutorial - Wikibooks
A Byte of Python (3.x) (HTML, PDF, EPUB, Mobi)
A Guide to Python's Magic Methods - Rafe Kettler
A Practical Introduction to Python Programming - Brian Heinold (HTML, PDF, Exercises sources)
A Whirlwind Tour of Python - Jake VanderPlas (PDF) (EPUB, MOBI)
Architecture Patterns with Python - Harry J.W. Percival & Bob Gregory (HTML)
Automate the Boring Stuff with Python, 2nd Edition: Practical Programming for Total Beginners - Al Sweigart (3.8)
- Automate the Boring Stuff with Python: Practical Programming for Total Beginners - Al Sweigart (3.4)
Beej's Guide to Python Programming - For Beginners - B. Hall (HTML,PDF)
Beyond the Basic Stuff with Python - Al Sweigart (3.x)
Biopython Tutorial and Cookbook (PDF)
Build applications in Python the antitextbook (3.x) (HTML, PDF, EPUB, Mobi)
Building Skills in Object-Oriented Design, V4 - Steven F. Lott (3.7)
- Building Skills in Object-Oriented Design, Release 2.2.1 - Steven F. Lott (PDF) (2.2.1)
- Building Skills in Object-Oriented Design, Release 3.1 - Steven F. Lott (PDF) (3.1)
Building Skills in Python - Steven F. Lott (PDF) (2.6)
Clean Architectures in Python - Leonardo Giordani (3.x)
Code Like a Pythonista: Idiomatic Python - David Goodger
CodeCademy Python
Composing Programs (3.x)
Cracking Codes with Python - Al Sweigart (3.6)
Data Structures and Algorithms in Python - B. R. Preiss (PDF)
Dive into Python 3 - Mark Pilgrim (3.0)
- Dive into Python - Mark Pilgrim (2.3)
From Python to NumPy - Nicolas P. Rougier (3.6)
Full Stack Python - Matt Makai
Functional Programming in Python - David Mertz
Fundamentals of Python Programming - Richard L. Halterman (PDF) (🚧 in process)
Google's Python Class (2.4 - 2.x)
Google's Python Style Guide
Hadoop with Python - Zachary Radtka, Donald Miner
Hands-On Natural Language Processing with Python - Rajesh Arumugam, Rajalingappaa Shanmugamani (Packt account required)
Hitchhiker's Guide to Python! (2.6)
How to Code in Python 3 - Lisa Tagliaferri (PDF)
How to Make Mistakes in Python - Mike Pirnat (PDF) (1st edition)
How to Think Like a Computer Scientist: Learning with Python, Interactive Edition - Brad Miller, David Ranum, Jeffrey Elkner, Peter Wentworth, Allen B. Downey, Chris Meyers, and Dario Mitchell (3.2)
- How to Think Like a Computer Scientist: Learning with Python 1st Edition - Allen B. Downey, Jeff Elkner and Chris Meyers (2.4) (HTML, PDF)
- How to Think Like a Computer Scientist: Learning with Python 2nd Edition - Jeffrey Elkner, Allen B. Downey, and Chris Meyers (Using Python 2.x)
- How to Think Like a Computer Scientist: Learning with Python 3 (RLE) - Peter Wentworth, Jeffrey Elkner, Allen B. Downey, and Chris Meyers (PDF)
Inside The Python Virtual Machine - Obi Ike-Nwosu (HTML, PDF, EPUB, Kindle) (Leanpub account or valid email requested)
Intermediate Python - Muhammad Yasoob Ullah Khalid (1st edition)
Introduction to Programming with Python (3.3)
- Introduction to Programming Using Python - Cody Jackson (1st edition) (2.3)
Introduction to Python - Kracekumar (2.7.3)
Introduction to Python for Econometrics, Statistics and Numerical Analysis - Kevin Sheppard (PDF) (3.8)
Invent Your Own Computer Games With Python - Al Sweigart (3.4)
Learn Python, Break Python
Learn Python Programming, Second Edition - Fabrizio Romano (Packt account required)
Learn Python the Right Way
Learn to Program Using Python - Cody Jackson (PDF) (🗃️ archived)
Learning to Program
Lectures on scientific computing with python - J.R. Johansson (2.7)
Making Games with Python & Pygame - Al Sweigart (3.2)
Math for programmers (using python)
Modeling and Simulation in Python - Allen B. Downey (PDF)
Modeling Creativity: Case Studies in Python - Tom D. De Smedt (PDF)
Natural Language Processing (NLP) with Python — Tutorial (PDF)
Natural Language Processing with Python (3.x)
Non-Programmer's Tutorial for Python 3 - Wikibooks (3.3)
- Non-Programmer's Tutorial for Python 2.6 - Wikibooks (2.6)
Official NumPy Reference - The NumPy Community (PDF)
Picking a Python Version: A Manifesto - David Mertz
Porting to Python 3: An In-Depth Guide (2.6 - 2.x & 3.1 - 3.x)
Practical Programming in Python - Jeffrey Elkner (PDF)
Practice Python Projects - Sundeep Agarwal
Problem Solving with Algorithms and Data Structures using Python - Bradley N. Miller and David L. Ranum (3.x)
Program Arcade Games With Python And Pygame (3.3)
Programming Computer Vision with Python (PDF)
Programming for Non-Programmers, Release 2.6.2 - Steven F. Lott (PDF) (2.6)
PySDR: A Guide to SDR and DSP using Python - Dr. Marc Lichtman (3.x)
Python 101 - Michael Driscoll (HTML, TEXT)
Python 2 Official Documentation (PDF, HTML, TEXT) (2.x)
Python 2.7 quick reference - John W. Shipman (PDF) (2.7)
Python 3 Official Documentation (PDF, EPUB, HTML, TEXT) (3.x)
Python 3 Tutorial
Python Data Science Handbook - Jake VanderPlas (HTML, Jupyter Notebooks)
Python for Everybody - Charles Russell Severance (PDF, EPUB, HTML) (3.x)
Python for Informatics: Exploring Information - Charles Russell Severance (2.7.5)
Python for you and me (2.7.3)
Python for you and me (3.x)
Python Idioms (PDF)
Python in Education - Nicholas Tollervey
Python in Hydrology - Sat Kumar Tomer
Python Koans (2.7 or 3.x)
Python Machine Learning By Example - Yuxi (Hayden) Liu (Packt account required)
Python Module of the Week (3.x)
- Python Module of the Week (2.x)
Python Notes for Professionals - Compiled from StackOverflow documentation (PDF)
Python Practice Book (2.7.1)
Python Practice Projects
Python Programming - Wikibooks (2.7)
Python Programming - Wikibooks (PDF) (2.6)
Python Programming And Numerical Methods: A Guide For Engineers And Scientists - Qingkai Kong, Timmy Siauw, Alexandre Bayen (3.7)
Python Tutorial - Tutorials Point
Scipy Lecture Notes
SICP in Python (3.2)
Slither into Python: An introduction to Python for beginners (3.7) (🗃️ archived)
Supporting Python 3: An In-Depth Guide (2.6 - 2.x & 3.1 - 3.x)
Test-Driven Web Development with Python: Obey the Testing Goat! using Django, Selenium and Javascript - Harry J.W. Percival (HTML) (3.3 - 3.x)
Text Processing in Python - David Mertz (2.3 - 2.x)
The Big Book of Small Python Projects - Al Sweigart
The Coder's Apprentice: Learning Programming with Python 3 - Pieter Spronck (PDF) (3.x)
The Definitive Guide to Jython, Python for the Java Platform - Josh Juneau, Jim Baker, Victor Ng, Leo Soto, Frank Wierzbicki (2.5)
The Little Book of Python Anti-Patterns (Source)
The Programming Historian - William J. Turkel, Adam Crymble and Alan MacEachern
The Python GTK+ 3 Tutorial
The Python Handbook - Flavio Copes (PDF, EPUB, Kindle) (email address requested)
The Standard Python Library - Fredrik Lundh
Think Complexity - Allen B. Downey (2nd Edition) (PDF, HTML)
Think DSP - Digital Signal Processing in Python - Allen B. Downey (PDF, HTML)
Think Python 2nd Edition - Allen B. Downey (3.x) (HTML, PDF)
- Think Python First Edition - Allen B. Downey (2.x) (HTML, PDF)
Tiny Python 3.6 Notebook - Matt Harrison (3.6)
Web2py: Complete Reference Manual, 6th Edition (pre-release) (2.5 - 2.x)

Django

Django Girls Tutorial (1.11)
Django Official Documentation (PDF) (1.5)
Django Official Documentation (PDF) (1.7)
Django Official Documentation (PDF) (1.9)
Django Official Documentation (PDF) (1.10)
Django Official Documentation (PDF) (2.2)
Django Official Documentation (PDF) (3.1)
Django Official Documentation (PDF) (3.2)
Django RESTful Web Services - Gaston C. Hillar (Packt account required)
Django Web Framework (Python) - MDN contributors
Djen of Django
Effective Django (1.5)
How to Tango With Django (1.7)
Test-Driven Development With Python And Django (1.11)

Flask

Explore Flask - Robert Picard
Flask Documentation - Pallets
The Flask Mega-Tutorial - Miguel Grinberg (0.9)

Kivy

Kivy Programming Guide

Pandas

Learn Pandas - Hernan Rojas (0.18.1)
pandas: powerful Python data analysis toolkit - Wes McKinney and the Pandas Development Team (HTML, PDF)

Pyramid

Quick Tutorial for Pyramid

Tornado

Learn Web Programming

QML

Qt5 Cadaques - Juergen Bocklage-Ryannel and Johan Thelin (HTML, PDF, ePub) (🚧 in process)

R

Advanced R Programming - Hadley Wickham
An Introduction to R -David M. Smith and William N. Venables
An Introduction to Statistical Learning with Applications in R - Gareth James, Daniela Witten, Trevor Hastie and Robert Tibshirani (PDF)
blogdown: Creating Websites with R Markdown - Yihui Xie, Amber Thomas, Alison Presmanes Hill
Cookbook for R - Winston Chang
Data Analysis and Prediction Algorithms with R - Rafael A. Irizarry
Data Analysis for the Life Sciences - Rafael A Irizarry, Michael I Love (Leanpub account or valid email requested)
Efficient R programming - Colin Gillespie, Robin Lovelace
Exploratory Data Analysis with R - Roger D. Peng (Leanpub account or valid email requested)
Forecasting: Principles and Practice - Rob J Hyndman and George Athanasopoulos
Functional Programming - Sara Altman, Bill Behrman and Hadley Wickham
Introduction to Probability and Statistics Using R - G. Jay Kerns (PDF)
Learning Statistics with R - Danielle Navarro
ModernDive - Chester Ismay and Albert Y. Kim
Practical Regression and Anova using R - Julian J. Faraway (PDF)
R for Data Science - Garrett Grolemund and Hadley Wickham
R for Spatial Analysis (PDF)
R Language for Programmers - John D. Cook
R Notes for Professionals - Compiled from StackOverflow Documentation (PDF)
R Packages - Hadley Wickham
R Practicals (PDF)
R Programming - Wikibooks
R Programming for Data Science - Roger D. Peng (Leanpub account or valid email requested)
R Succinctly, Syncfusion (PDF, Kindle) (email address requested, not required)
Summary and Analysis of Extension Program Evaluation in R - Salvatore S. Mangiafico
The caret Package - Max Kuhn
The R Inferno - Patrick Burns (PDF)
The R Language
The R Manuals
Tidy Text Mining with R - Julia Silge and David Robinson

Racket

How to Design Programs - Matthias Felleisen, Robert Bruce Findler, Matthew Flatt, Shriram Krishnamurthi
Programming Languages: Application and Interpretation
The Racket Guide

Raku

Metagenomics - Ken Youens-Clark
Perl 6 at a Glance - Andrew Shitov (PDF)
Raku Guide (HTML) (PDF)
Raku One-Liners - Andrew Shitov (PDF)
Raku Programming - Wikibooks (HTML)
Think Raku - Laurent Rosenfeld, with Allen B. Downey (PDF)
Using Perl 6 (🚧 project is dead)
X=Raku - Learn X in Y minutes (HTML)

Raspberry Pi

Raspberry Pi: Measure, Record, Explore - Malcolm Maclean (HTML)
Raspberry Pi Users Guide - (2012) - Eben Upton (PDF)
The Official Raspberry Pi Project Book 1 (2015) (PDF)

REBOL

Learn REBOL - Nick Antonaccio

Ruby

A community-driven Ruby style guide
CodeCademy Ruby
Developing Games With Ruby - Tomas Varaneckas
I Love Ruby
Introduction to Programming with Ruby - Launch School
Just Enough Ruby to Get By
Learn Ruby First - Frederick John
Learn Ruby the Hard Way - Zed A. Shaw
Learn to Program - Chris Pine
Mastering Roda - Federico Iachetti, Avdi Grimm and Jeremy Evans
Mr. Neighborly's Humble Little Ruby Book
Object Oriented Programming with Ruby - Launch School
Practicing Ruby
Programming Ruby
Ruby Best Practices - Gregory Brown (PDF)
Ruby Hacking Guide
Ruby in Twenty Minutes
Ruby Koans
Ruby Learning
Ruby Notes for Professionals - Compiled from StackOverflow Documentation (PDF)
Ruby one-liners cookbook - Sundeep Agarwal
Ruby Style Guide - Airbnb
Ruby User's Guide
Ruby Web Dev: The Other Way - Yevhen Kuzminov
Rubyfu
The Bastards Book of Ruby
The Book Of Ruby - Huw Collingbourne
The Definitive Ruby Tutorial For Complete Beginners - Jesus Castello
The Little Book Of Ruby - Huw Collingbourne
The Ruby Reference - Victor Shepelev
The Unofficial Ruby Usage Guide (at Google) - Ian Macdonald
Using Blocks in Ruby - Jay McGavren (PDF) (🗃️ archived)
Why's (Poignant) Guide to Ruby

RSpec

Better Specs (RSpec Guidelines with Ruby)

Ruby on Rails

A community-driven Rails style guide
Api on Rails 6 - Alexandre Rousseau
Building REST APIs with Rails - Abraham Kuri Vargas
Kestrels, Quirky Birds, and Hopeless Egocentricity - Reg Braithwaite
Learn Ruby on Rails as You Modify a Craigslist Clone
Learn Ruby on Rails: Book One - Daniel Kehoe (PDF, EPUB) (Leanpub account or valid email requested)
Objects on Rails - Avdi Grimm
Rails Girls Guides
Ruby Notes for Professionals - Compiled from StackOverflow Documentation (PDF)
Ruby on Rails 3.2 - Step by Step
Ruby on Rails 4.0 Guide
Ruby on Rails Guides
Ruby on Rails Notes for Professionals - Compiled from StackOverflow Documentation (PDF)
Ruby on Rails Tutorial (Rails 5): Learn Web Development with Rails - Michael Hartl
Upgrading to Rails 4

Sinatra

Sinatra Book

Rust

A Gentle Introduction To Rust - Steve J Donovan
Asynchronous Programming in Rust
Guide to Rustc Development
Learn Rust With Entirely Too Many Linked Lists - Alexis Beingessner
Rust by Example
Rust Cookbook
Rust for Rubyists - Steve Klabnik
Rust For Systems Programmers - Nick Cameron
The Embedded Rust Book
The Little Book of Rust Macros
The Rust Language Reference
The Rust Performance Book
The Rust Programming Language
The Rust RFC Book
The Rustc Book
The Rustonomicon
Why Rust?

Sage

Sage for Power Users - William Stein (PDF)
The Sage Manuals

Scala

A Scala Tutorial for Java programmers (PDF)
Advanced Scala with Cats - Noel Welsh and Dave Gurnell (PDF, HTML, EPUB) (email address requested, not required)
Another tour of Scala - David Copeland
Creative Scala - Noel Welsh and Dave Gurnell (PDF, HTML, EPUB) (email address requested, not required)
EAI Patterns with Actor Model - Vaughn Vernon
Effective Scala
Essential Scala - Noel Welsh and Dave Gurnell (PDF, HTML, EPUB) (email address requested, not required)
Functional Programming for Mortals - Sam Halliday
Functional Programming, Simplified (Scala edition) - Alvin Alexander (free preview (400 pages from 595), PDF)
Hello, Scala - Alvin Alexander (free preview (120 pages from 257), PDF)
Learning Scala in small bites
Learning Scalaz
Pro Scala: Monadic Design Patterns for the Web
Programming in Scala, First Edition - by M. Odersky, L. Spoon, B. Venners
Pure functional HTTP APIs in Scala - Jens Grassel
PythonToScala - Rob Story
S-99: Ninety-Nine Scala Problems - Phil! Gold
Scala & Design Patterns: Exploring Language Expressivity - Fredrik Skeel Løkke (PDF)
Scala Book - Alvin Alexander (PDF, MOBI, HTML, EPUB)
Scala By Example - M. Odersky (PDF)
Scala Cookbook: Bonus Chapters - Alvin Alexander (PDF)
Scala for Perl 5 Programmers - Breno G. de Oliveira
Scala School by Twitter
Scala Succinctly - Chris Rose
Scala Tutorial - Tutorials Point
tetrix in Scala
The Neophyte's Guide to Scala - Daniel Westheide
The Type Astronaut's Guide to Shapeless - Dave Gurnell (PDF, HTML, EPUB) (email address requested, not required)
Xtrace

Lift

Exploring Lift (published earlier as "The Definitive Guide to Lift", PDF)
Lift
Lift Cookbook - Richard Dallaway
Simply Lift - David Pollak (PDF)

Play Scala

Essential Play - Dave Gurnell (PDF, HTML, EPUB) (email address requested, not required)
Play Framework Recipes - Alvin Alexander

Scheme

A Pamphlet Against R. Computational Intelligence in Guile Scheme
An Introduction to Scheme and its Implementation
Concrete Abstractions: An Introduction to Computer Science Using Scheme - M. Hailperin, B. Kaiser, K. Knight
Scheme Tutorial
Simply Scheme: Introducing Computer Science - B. Harvey, M. Wright
Teach Yourself Scheme in Fixnum Days
The Scheme Programming Language: Edition 3 - The Scheme Programming Language: Edition 4
Write Yourself a Scheme in 48 Hours - Wikibooks

Scilab

Scratch

An Introductory Computing Curriculum Using Scratch
Computer Science Concepts in Scratch
Learn to Code with Scratch - The MagPi magazine (PDF)
Scratch Programming Playground - Al Sweigart

Sed

GNU sed - Sundeep Agarwal
Sed - An Introduction and Tutorial - Bruce Barnett

Self

The Self Handbook

Smalltalk

Deep into Pharo - Alexandre Bergel, Damien Cassou, Stéphane Ducasse, Jannik Laval
Dynamic Web Development with Seaside - S. Ducasse, L. Renggli, C. D. Shaffer, R. Zaccone
Enterprise Pharo: a Web Perspective
Numerical Methods with Pharo - Didier Besset, Stéphane Ducasse, Serge Stinckwich
Pharo by Example - Andrew P. Black et al. (Smalltalk Implementation and IDE)
Stef's Free Online Smalltalk Books (meta-list)