Combat Flight Simulator for LINUX. WW2. Network and VOIP. Open-source.
Self-hosted game stream host for Moonlight
The fastest AI powered Aimbot
Injectable LUA scripting system, SDK generator, live property editor
UCI chess engine
An efficient graphical Minecraft seed finder and map viewer
The Playstation 2 emulator
Compatibility tool for Steam Play based on Wine and other components
Desktop/Android/HTML5/iOS Java game development framework
Skin changer for League of Legends (LOL)
Flexible level editor
DOSBox Staging is a modern continuation of DOSBox
Multi Theft Auto is a game engine
Fast PlayStation 1 emulator for x86-64/AArch32/AArch64
Voxel game-creation platform with easy modding and game creation
The game engine for everyone
fheroes2 is a recreation of Heroes of Might and Magic II game engine
Open Source MMORPG Framework
A game engine with an emphasis on real-time cutting-edge solutions
Lossless Scaling Frame Generation on Linux
Free game engine for development of desktop, mobile, and web games
A lightweight game server framework implemented with Actor Model
Open source simulation game based on Transport Tycoon Deluxe
An open source flight dynamics & control software library
Voxel game engine in C++ with OpenGL