Real Time Strategy game engine supporting early Westwood classics
Open source simulation game based on Transport Tycoon Deluxe
A nonsense activity generator
Gideros Release version
3D game engine/framework in C, with Luajit and Python bindings now
A dead simple 2D game library for Go
A lightweight game server framework implemented with Actor Model
Open source voxel world
An award-winning drawing program for children of all ages
FlightGear Flight Simulator: free open-source multiplatform flight sim
RTS game with the theme of Strategy by Design
A companion for your LOTRO activities
Good-looking and addictive OpenSource games
Odamex is a free, cross-platform, modern client-server Doom engine
A cross-platform port of Hexen II game.
Domination is a game that is a bit like the board game Risk
Realism Invictus mod for Civilization IV
TKD Scoring Wi-Fi Server supporting Android and IPhone clients
A 2D Real Time Strategy space combat game.