The ioquake3 community effort to continue supporting/developing id's
3D Procedural Game Engine Using OpenGL
Free game engine for development of desktop, mobile, and web games
Free, cross-platform 2D game engine powered by Haxe and OpenFL
2D JavaScript Physics Engine
scene-oriented, flexible 3D engine (C++, Python, C#, Java)
High performance UI layout library in C
A game framework written with osu! in mind.
A Flutter based game engine
The Open Toolkit library is a fast, low-level C# wrapper for OpenGL
Python MUD/MUX/MUSH/MU* development system
Zig game engine & graphics toolkit
Cross-platform game engine in Rust
Multi-platform 2D and 3D game engine
Full featured MUD server with all the trimmings.
Amateur 3D Game Engine
API (C#) for simulating certain aspects of a ZX spectrum for porting.
A simple cross-platform game engine for creating old-school 2D games
Here we're trying to create the easiest open-source game engine.
Game engine supporting many 3D/2D formats and graphic effects
Orx: Portable Game Engine
Visual Basic 6 2D online adventure game engine
Tools and Z80 engine for creating adventure games. (RUST)
PyCAPGE - Python Classic Adventure Point and Click Game Engine
Haskell game engine library for roguelike dungeon crawlers