Free 32/64/16-bit multi-platform Pascal and Object Pascal compiler
A 32/64/16-bit Pascal compiler for Win32/64/CE, Linux, Mac OS X/iOS, FreeBSD, OS/2, Game Boy Advance, Nintendo NDS and DOS; semantically compatible with Delphi, Borland Pascal and Mac Pascal (partially) with extra features, e.g. operator overloading.
A portable, multi-platform, command-line driven graphing utility
A famous scientific plotting package, features include 2D and 3D plotting, a huge number of output formats, interactive input or script-driven options, and a large set of scripted examples.
NetHack is a popular single player dungeon exploration game that runs on a wide variety of computer systems.
A multi-format module player and library
xmp is a module player for Unix-like systems that plays over 90 mainstream and obscure module formats from Amiga, Atari, Acorn, Apple IIgs and PC, including Protracker (MOD), Scream Tracker 3 (S3M), Fast Tracker II (XM) and Impulse Tracker (IT) files.
This project provides binary packages for the Ada front end of GNU compiler collection. The project also provides various Ada libraries like the Ada Web Server and Ada aware Integrated Development Environments (gps and vim).
Wcd is another Norton Change Directory (NCD) clone. Wcd is a command-line program to change directory fast. It includes a full screen interactive directory tree browser with speed search and a fast way to choose between multiple matches.
Nethack 1.3d revived for other platforms
Ports of the Nethack 1.3d revived source to platforms outside of UNIX
The open sourced NetRexx reference implementation
NetRexx is a dialect of the REXX programming language to run on the Java virtual machine. It supports a classic REXX syntax, with no reserved keywords, along with considerable additions to support object-oriented programming in a manner compatible with Java's object model, yet can be used as both a compiled and an interpreted language, with an option of using only data types native to the JVM or the NetRexx runtime package. Originally from IBM, NetRexx is the creation of Mike Cowlishaw, the 'Father of Rexx'. This IBM product has been open sourced in 2011.
open source analogue of IBM OS/2 operating system