Free Pascal:Compiler for Pascal and Object Pascal, runs on many platforms: Amiga, DOS, Linux, OS/2, Win32. Compatible with Turbo Pascal, supports advanced features such as function overloading. IDE available. [Open Source, modified LGPL]
BadHim: Home of FPCShell, an IDE for Free Pascal compiler; and useful to edit a wide range of documents, such as C++ files, Web content.
Dev-Pascal: A full-featured integrated development environment (IDE), which is able to create Windows or console-based Pascal programs using the Free Pascal compiler.
EFLIB: Free Pascal class library.
FPC-Lazarus Project: The class libraries and development environment for Free Pascal that emulate Delphi.
Free Pascal Compiler Web Ring: List of websites related to Free Pascal compiler and programming.
Free Pascal Meets SDL: Tutorial to configure MS Windows to work with SDL (Simple DirectMedia Layer) library under Free Pascal. SDL was first done in C/C++, but headers were translated to pascal units, so library is usable for Pascal.
GTK+ for Free Pascal: Official FreePascal GTK+ translation
Open Source Pascal Compiler Project, Macintosh Version: An open-source Pascal Compiler project in hopes to establish a freeware Pascal compiler for the Macintosh platform.