Godot is a powerful cross-platform game engine
Open source voxel game engine with support for survival and crafting
The game engine for everyone
An open-source sandbox tower defense game
RetroArch is a frontend for emulators, game engines and media players.
A certain block game
Open source HTML5 game framework that offers WebGL and Canvas
Desktop/Android/HTML5/iOS Java game development framework
Sandbox video game with a powerful physics engine
Voxel game-creation platform with easy modding and game creation
Cocos simplifies game creation and distribution with Cocos Creator
Xash3D FWGS engine
One framework for creating powerful cross-platform games
A simple and easy-to-use library to enjoy videogames programming
Free, cross-platform 2D game engine powered by Haxe and OpenFL
A dead simple 2D game engine for Go
New Godot bindings for Swift
Stream switch games to your PC via USB or network
Multi-platform 2D and 3D game engine
A cross-platform PSP emulator
Multi-platform Engine for Desktop, XBOX (UWP) and Mobile games
Cross-platform game engine in Rust
Action-adventure game originally released in 2013
Open source library for creative expression on the web, desktop, etc.
Do virtual gear shifting (and more) in any rider app