Unity3D Client And C# Server Framework
lua dev plugin for unreal engine 4 or 5
You can make it - Open Source MMORPG Platform
OgreWin3D
PyCAPGE - Python Classic Adventure Point and Click Game Engine
Sdk library for creating 2048 game in c#.
FreeCS is a free-software reimplementation of Counter-Strike 1.5.
The Old PacMan! programed over the Salvat Game Fabric platform
Engines for Batch Games
3D Game engine
C++ game libraries plus server.
TurboSphere is an easy to learn and powerful JS based game engine.
C++ Framework for slot machine games
An extensible development framework for roleplay games.
A framework for games with defense towers along a path.
Map and logic editor