The flexible game engine
A refreshingly simple data-driven game engine built in Rust
RPG Maker 2000/2003 and EasyRPG games interpreter
3D C++ Game Engine - yet another open source game engine
Data-oriented and data-driven game engine written in Rust
OpenSAGE is a free, open source re-implementation of SAGE
3D Game engine
Free MMORPG Engine. Develop and host graphical browser-based games.