s&box is a modern game engine, built on Valve's Source 2
Open source library for N64 development
JavaScript-based game engine designed to empower developers
Descent 3 by Outrage Entertainment
Zoomable user interface (ZUI) with file manager, file viewers and more
Open and edit the archive files used in over 5700 games.
Emulator of the 8-bit computers Sharp MZ-800 / MZ-700 / MZ-1500
SDL based generic 2D game engine
JavaScript framework to build game engines, games, emulators and apps
A c++ public domain audio output class
3D .NET engine for Windows, Linux, Mac
A pygame music lib.
A generic 2D engine for any kind of game
TurboSphere is an easy to learn and powerful JS based game engine.
High-level C++ framework to ease game development
3D game engine for C and C++
Pear3DEngine is a modern and modular 3D development framework