Desktop/Android/HTML5/iOS Java game development framework
A cross-platform PSP emulator
One framework for creating powerful cross-platform games
Open source simulation game based on Transport Tycoon Deluxe
Open 3D Engine (O3DE) is an Apache 2.0-licensed multi-platform 3D
Open Source MMORPG Framework
Svelto ECS C# Entity Component System
C-evo Distant Horizon; Empire Building Game
An Open Source DOS emulator to run old DOS games
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 strategy game with a high fantasy theme
Chess Database and Toolkit program
A standalone UQM mod made to enhance gameplay and visuals
An Ubuntu remix for both new and experienced Linux sophisticates
For exploring cellular automata like Conway's Game of Life.
Chess Database and PGN viewer
A modern, cross-platform Quake game engine based on FitzQuake.