diff --git a/src/ext/plantuml/com/ctreber/readme.md b/src/ext/plantuml/com/ctreber/readme.md
new file mode 100644
index 000000000..4438e1e93
--- /dev/null
+++ b/src/ext/plantuml/com/ctreber/readme.md
@@ -0,0 +1,12 @@
+> [!WARNING] 
+> **Disclaimer**:
+> This file was not part of the original package.
+> It was included only on the PlantUML package to provide source citation and documentation.
+
+# Directory Documentation for `ctreber`
+
+## Description
+Internal copy of `AC.earth` - `XEarth` for Java _(code of Christian Treber)_.
+
+## See more information on
+- [readme of `plantuml/acearth`](../../../../net/sourceforge/plantuml/acearth/readme.md)
diff --git a/src/net/sourceforge/plantuml/ditaa/package-info.java b/src/net/sourceforge/plantuml/ditaa/package-info.java
index c2cbdbd4c..f0a3a50f5 100644
--- a/src/net/sourceforge/plantuml/ditaa/package-info.java
+++ b/src/net/sourceforge/plantuml/ditaa/package-info.java
@@ -3,7 +3,9 @@
  * <a href="https://plantuml.com/ditaa" target="_top">
  * Ditaa Diagram</a>.
  *
+ * @see org.stathissideris.ascii2image.core
  * @see org.stathissideris.ascii2image.graphics
+ * @see org.stathissideris.ascii2image.text
  * 
  */
 package net.sourceforge.plantuml.ditaa;
diff --git a/src/net/sourceforge/plantuml/flowdiagram/package-info.java b/src/net/sourceforge/plantuml/flowdiagram/package-info.java
new file mode 100644
index 000000000..c146b9255
--- /dev/null
+++ b/src/net/sourceforge/plantuml/flowdiagram/package-info.java
@@ -0,0 +1,7 @@
+/**
+ * Provides classes used to manage 
+ * <a href="http://alphadoc.plantuml.com/doc/markdown/en/flow-diagram" target="_top">
+ * Flow Diagram</a>.
+ *
+ */
+package net.sourceforge.plantuml.flowdiagram;
diff --git a/src/net/sourceforge/plantuml/flowdiagram/readme.md b/src/net/sourceforge/plantuml/flowdiagram/readme.md
new file mode 100644
index 000000000..720bea988
--- /dev/null
+++ b/src/net/sourceforge/plantuml/flowdiagram/readme.md
@@ -0,0 +1,11 @@
+# Directory Documentation for `flowdiagram`
+
+## Description
+This package provides classes used to manage [PlantUML Flow Diagram](http://alphadoc.plantuml.com/doc/markdown/en/flow-diagram).
+
+## Link
+- [Flow Diagram _(on Alpha-doc)_](http://alphadoc.plantuml.com/doc/markdown/en/flow-diagram)
+
+## Reference
+- [GH-501](https://github.com/plantuml/plantuml/issues/501#issuecomment-805783661)
+- [QA-13557](https://forum.plantuml.net/13557/support-for-the-different-%40start-commands)
diff --git a/src/net/sourceforge/plantuml/klimt/color/package-info.java b/src/net/sourceforge/plantuml/klimt/color/package-info.java
new file mode 100644
index 000000000..1568496a9
--- /dev/null
+++ b/src/net/sourceforge/plantuml/klimt/color/package-info.java
@@ -0,0 +1,12 @@
+/**
+ * Provides classes used to manage 
+ * <a href="https://plantuml.com/color" target="_top">
+ * Color</a>.
+ *
+ * @see net.sourceforge.plantuml.help.CommandHelpColor
+ * @see net.sourceforge.plantuml.eggs.PSystemColorsFactory
+ * @see net.sourceforge.plantuml.klimt.creole.command.CommandCreoleColorAndSizeChange
+ * @see net.sourceforge.plantuml.klimt.creole.command.CommandCreoleColorChange
+ * 
+ */
+package net.sourceforge.plantuml.klimt.color;
diff --git a/src/net/sourceforge/plantuml/klimt/color/readme.md b/src/net/sourceforge/plantuml/klimt/color/readme.md
new file mode 100644
index 000000000..6d7808afb
--- /dev/null
+++ b/src/net/sourceforge/plantuml/klimt/color/readme.md
@@ -0,0 +1,16 @@
+# Directory Documentation for `color`
+
+## Description
+This package provides classes used to manage [PlantUML Color](https://plantuml.com/color).
+
+## Link
+- [PlantUML Color](https://plantuml.com/color)
+
+## Reference
+
+## Credit or Inspiration
+- [HSLuv, a developer friendly perceptual color space](https://www.kuon.ch/post/2020-03-08-hsluv/) by _Nicolas Goy_.
+- [HSLuv color space](https://www.hsluv.org) by [_Alexei Boronine_](https://www.boronine.com)
+- :octocat: [hsluv/hsluv-java](https://github.com/hsluv/hsluv-java)
+- [Calculating Color Contrast](https://24ways.org/2010/calculating-color-contrast) by _Brian Suda_.
+- [`HSLColor.java` _(on Web Archive)_](https://web.archive.org/web/20220328231936/http://www.camick.com/java/source/HSLColor.java)
diff --git a/src/net/sourceforge/plantuml/klimt/creole/package-info.java b/src/net/sourceforge/plantuml/klimt/creole/package-info.java
new file mode 100644
index 000000000..99f501c28
--- /dev/null
+++ b/src/net/sourceforge/plantuml/klimt/creole/package-info.java
@@ -0,0 +1,7 @@
+/**
+ * Provides classes used to manage 
+ * <a href="https://plantuml.com/creole" target="_top">
+ * Creole</a> (markup language).
+ *
+ */
+package net.sourceforge.plantuml.klimt.creole;
diff --git a/src/net/sourceforge/plantuml/klimt/creole/readme.md b/src/net/sourceforge/plantuml/klimt/creole/readme.md
new file mode 100644
index 000000000..d1dd36370
--- /dev/null
+++ b/src/net/sourceforge/plantuml/klimt/creole/readme.md
@@ -0,0 +1,10 @@
+# Directory Documentation for `creole`
+
+## Description
+This package provides classes used to manage [PlantUML Creole](https://plantuml.com/creole) markup language.
+
+## Link
+- [PlantUML Creole](https://plantuml.com/creole)
+
+## Reference
+- [Creole (markup) _(on Wikipedia)_](https://en.wikipedia.org/wiki/Creole_(markup))
diff --git a/src/org/stathissideris/ascii2image/readme.md b/src/org/stathissideris/ascii2image/readme.md
new file mode 100644
index 000000000..2428d1f19
--- /dev/null
+++ b/src/org/stathissideris/ascii2image/readme.md
@@ -0,0 +1,15 @@
+> [!WARNING] 
+> **Disclaimer**:
+> This file was not part of the original package.
+> It was included only on the PlantUML package to provide source citation and documentation.
+
+# Directory Documentation for `ascii2image`
+
+## Description
+Internal copy of `ditaa` _(code of Stathis Sideris)_.
+
+## Credit
+- :octocat: [stathissideris/ditaa](https://github.com/stathissideris/ditaa)
+
+## See more information on
+- [readme of `plantuml/ditaa`](../../../net/sourceforge/plantuml/ditaa/readme.md)