A 2D rigid body physics engine for the web
Zig game engine & graphics toolkit
Godot game template and component-based framework
SRCP system daemon
Extensible Line-drawing & Polygon-filling Rasterization Libs for Java
The multiplayer game engine
Amazon Lumberyard is a free AAA game engine
Source code of the chapters of the book 3D Game Development with LWJGL
An End-To-End, Lightweight and Flexible Platform for Game Research
realtime 3d surface rendering library
Modular Gaming Open Source Persistent Browser Based Game Framework
A 3D, fully concurrent game engine
A multiplatform game engine for interactive fiction experiences
Pear3DEngine is a modern and modular 3D development framework
An extensible development framework for roleplay games.
Modular Minecraft server plugin - commands, events, ...
Tools for installing and setting up dedicated Battlefield servers
A Portable, open source, modular framework for playing various trading