Free Pascal Compiler - A 32 bit Pascal compiler available for different operating systems (Linux, DOS, AmigaOS, OS/2, Win32).

http://www.freepascal.org/

Borland Turbo Pascal Compiler - The earlier versions of Borland's Turbo Pascal, Turbo C and Turbo C++ are now available FREE from Borland's website (create a login ID and click the Museum link.)

http://dn.codegear.com/museum/

DevPascal - Dev-Pascal is a full-featured integrated development environment (IDE), which is able to create Windows or console-based Pascal programs using the Free Pascal or GNU Pascal compilers.

http://www.bloodshed.net/devpascal.html

Pascal X - Pascal X - a complete Pascal (development) environment with a very fast compiler/interpreter for Windows 95/NT console. Includes a set of tools to assist novice programmers and can be used with English or Portuguese keywords.

http://www.readyideas.com/pascalx.htm

Inno Pascal - Inno Pascal is a simple Pascal compiler for Win32. It produces compact, native-code x86 executables without requiring any external assemblers or linkers. Full source code is included under the GPL license.

http://other.jrsoftware.org/ip/

Think Pascal 4.5 (Mac) - Pascal development system for the Macintosh.

http://www.think-pascal.org/#HowToGet