RetroArch is a frontend for emulators, game engines and media players.
Do virtual gear shifting (and more) in any rider app
Open-source Android/Desktop remake of Civ V
One framework for creating powerful cross-platform games
Fast, user-friendly cross-platform custom launcher for Minecraft
Open source simulation game based on Transport Tycoon Deluxe
Xash3D FWGS engine
Desktop/Android/HTML5/iOS Java game development framework
A programming font based on the typeface used in Minecraft
Fast and lightweight JavaScript game engine built on WebGL and glTF
Solar2D Game Engine main repository (ex Corona SDK)
C# application with primary purpose of farming Steam cards
Open source HTML5 game framework that offers WebGL and Canvas
Cocos simplifies game creation and distribution with Cocos Creator
Free game engine for development of desktop, mobile, and web games
DeSmuME is a Nintendo DS emulator
A generic, simple and fast implementation of Deepmind's AlphaZero
Ct.js is a desktop game engine that makes learning programming fun
Multi-platform Engine for Desktop, XBOX (UWP) and Mobile games
KorGE Game Engine. Multiplatform Kotlin Game Engine & Korlibs
Stride (formerly Xenko), a free and open-source cross-platform C# game
Open source library for creative expression on the web, desktop, etc.
A fresh & lightweight javascript game engine
HTML5 Canvas Tower Building Game
Accuracy-focused XNA4 reimplementation for open platforms