Simple Directmedia Layer
RetroArch is a frontend for emulators, game engines and media players.
Simple and Fast Multimedia Library
Real Time Strategy game engine supporting early Westwood classics
UI Automation Framework for Games and Apps
Gideros Release version
A lightweight game server framework implemented with Actor Model
Making multi-player gamedev simpler since 2017
FlightGear Flight Simulator: free open-source multiplatform flight sim
A free transportation simulator game
RTS game with the theme of Strategy by Design
Chess Database and PGN viewer
For exploring cellular automata like Conway's Game of Life.
C64/Amiga emulator with shader and runAhead
A modern, cross-platform Quake game engine based on FitzQuake.
3D Engine c++
A cross-platform port of Hexen II game.
Odamex is a free, cross-platform, modern client-server Doom engine
INSTEAD - Simple Text Adventure Interpreter.
Cross-platform, GPL reimplementation of the classic : Syndicate