The game engine for everyone
Multi-platform Engine for Desktop, XBOX (UWP) and Mobile games
A refreshingly simple data-driven game engine built in Rust
Zig game engine & graphics toolkit
New Godot bindings for Swift
scene-oriented, flexible 3D engine (C++, Python, C#, Java)
Open source library for creative expression on the web, desktop, etc.
The Open Toolkit library is a fast, low-level C# wrapper for OpenGL
A completely free, open-source, 2D game engine
GemRB is a portable open-source implementation of the Infinity Engine
Game engine supporting many 3D/2D formats and graphic effects
Urho3D Game engine
Engo is an open-source 2D game engine written in Go
2D Game Engine
A cross-platform 2D game engine
Real-time RPG for PC/tablet/phone; multiple quests and random dungeons
Portable game engine with main focus on point-and-click adventures
Paintown is a 2d fighting game engine.
Cross platform 2D/3D game engine written in C++11 & OpenGL ES 2/3