A syntax directed editor, interpreter and IDE for Pascal. Free source code (linux) plus binaries for IBM PC and Atari ST.

32-bit Pascal compilers for DOS, OS/2, and Windows 9x/NT. Multi-target edition allows you to compile to any platform. Commercial software, but limited demo edition is available for download.

List of free Pascal compilers and development environments with useful descriptions.

A compiler that generates portable byte-code executables from Pascal source files, and an interpreter that runs the byte-code executables at Windows, Linux, FreeBSD, Solaris/x86, and Solaris/Sparc. The Windows Edition includes an Integrated Development Environment (IDE).

A Pascal interpreter. It's Delphi/Kylix compatible. Nemesis Pascal uses internally a modified version of the JEDI Pascal Interpreter. It's cross-platform (currently Windows and Linux) and includes Virtual Machine, IDE (RAD), Web Scripting Tool. [Open source, GPL and MPL]

Complete implementation of the P4 Pascal compiler and interpreter. Source for the compiler is available in C and Pascal.