s&box is a modern game engine, built on Valve's Source 2
A rhythm game made with HaxeFlixel
A completely free, open-source, 2D game engine
Open source library for N64 development
JavaScript-based game engine designed to empower developers
Fast and lightweight JavaScript game engine built on WebGL and glTF
Descent 3 by Outrage Entertainment
Open source library for creative expression on the web, desktop, etc.
Multi-platform Engine for Desktop, XBOX (UWP) and Mobile games
Go bindings for raylib, a simple and easy-to-use library
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
cross-platform sound-playing package for C++ apps
A c++ public domain audio output class
3D C++ Game Engine - yet another open source game engine
mGSTEP port of the Cube game engine
Modern 3D engine and IDE written using C# and C++.
2D Game Engine with Lua Scripting made on top of SFML
A real-time game development platform
Processes dialogue text files exported by the Bethesda Softworks SDK