X Invasion is a simple clone of the famous game Space Invaders. It is for one or two players. It has some other new features and final level bosses.
Nuvie is an open source engine for Ultima 6, Martian Dreams, and The Savage Empire. It uses the original data files from the games.
OpenXcom is a new engine for the old game UFO: Enemy Unknown (X-Com: UFO Defense in the USA),
a popular strategy videogame made by Mythos/Microprose in which you take control of the X-Com
organization to fight off the alien menace invading Earth.
Map/reduce code for processing Wikipedia Pagecounts.
An IDE for HTML, Bash, Perl, PHP, C, etc.