An open source reimplementation of the Among Us Server
Voxel game-creation platform with easy modding and game creation
Xash3D FWGS engine
One framework for creating powerful cross-platform games
Open-source engine for Heroes of Might and Magic III
TKD Scoring Wi-Fi Server supporting Android and IPhone clients
A promising chess program
Source of Mana is a unique 2D MMORPG
3D Multiplayer Hover Soccer
Open source reimplementation of GTA San Andreas game engine in Unity
A cross-platform 2D game engine
A cross-platform interpreter for many point-and-click adventure games
Massively multiplayer online game server and client framework
Android, DOS, FirefoxOS, Linux, MacOS and Windows all in one..
plugin-based RPG manager in C++ and Qt5
Cross platform 2D/3D game engine written in C++11 & OpenGL ES 2/3
Cross platform administration tool for Source Engine dedicated servers
An e-stim signal generator in java
Cross-platform 2D game engine
Space Exploration Game