FlightGear Flight Simulator: free open-source multiplatform flight sim
0 A.D. is a free, open-source, cross-platform real-time strategy game.
90-ball bingo with sound
Free Texas Holdem Poker game using HTML5, CSS and JavaScript
games for kids
Space shooter style game arcade version - Games/Entertainment Software
ZED OS the clone of Windows XP
Poko Rocket is a open-source tribute to Chu Chu Rocket game.
Mac OS X Dashboard Widget for reading comics
Run Windows applications on any computer.
Baystation's flavor of Space Station 13
Open-DIS implements the IEEE DIS protocol in multiple languages.
HTLS is an Hattrick live match viewer, based on the old Livefox.
Wolfenstein 3D HTML5 TOTAL Conversion
A simple comic book inventory application for Linux, OS X and Windows.
Simple OpenSource scoreboard
Android, DOS, FirefoxOS, Linux, MacOS and Windows all in one..
Sudoku web game
A puzzle game of rules acting upon rules. Create the desired pattern.
The famous Maze War game recreated as a modern web application.
Puzzle game demonstrating whats so hard about binary integer factoring
The original Xivio.com World Server Core