Allegro.pas - Use the Allegro game programming library with Pascal. [API Docs].

Brook framework - Complete framework for web applications. [API Docs].

Castle Game Engine - Cross-platform 3D and 2D game engine, with an editor, lots of graphic effects, support for glTF, X3D and many other formats. [API Docs].

Geoblock - Integrated open source software for 2D/3D modelling, computational geometry and visualization of spatial datasets based on GLScene.

GLScene - Open source OpenGL-based library for Delphi, C++Builder and Free Pascal.

Internet Tools - Package to process web pages; and the TreeListView, a tree view with record columns. [API Docs].

OSMMap - Visual control for Delphi and Lazarus to display OSM map. [API Docs].

PascalSCADA - Set of components for Delphi/Lazarus, used to develop SCADA applications.

PasDoc - Our own sources can be processed by PasDoc itself, see PasDocAutoDoc.

primesieve-pas - Pascal bindings for PrimeSieve library. [API Docs].

SChannelTLS - Helper functions and socket classes to perform TLS communication by means of WinAPI (SChannel)

Synapse - Synchronous TCP/IP Library for Delphi, C++ Builder, Kylix and FreePascal. [API Docs].

SynEdit - Component suite for Delphi/Kylix to highlight code source.

SynProject - GPL Delphi source code versioning and documentation tool, which includes a fork of PasDoc: speed enhancements, cache of parsing content in a .zip archive, integrated GraphViz diagrams, documentation generation in MS Word format, integration into a complete project documentation tool.

Valkyrie - General purpose game-development library.

yana - Yet another network analyzer.