Retro game engine for creating games like it's 1997
A work-in-progress PlayStation 4 emulator
VR Mosaic - C++ Builder Applet v.2.5
An Open Source DOS emulator to run old DOS games
An award-winning drawing program for children of all ages
Open source reimplementation of GTA San Andreas game engine in Unity
FlightGear Flight Simulator: free open-source multiplatform flight sim
A free transportation simulator game
An Ubuntu remix for both new and experienced Linux sophisticates
A strategy game with a high fantasy theme
A very efficient tutor.
Chess Database and Toolkit program
C64/Amiga emulator with shader and runAhead
Colonize the New World.
Chess Database and PGN viewer
Opensource crossplatform Fallout 2 game engine writen in C++ and SDL
A modern, cross-platform Quake game engine based on FitzQuake.
For exploring cellular automata like Conway's Game of Life.