Godot is a powerful cross-platform game engine
Android real-time display control software
An open-source sandbox tower defense game
Stream switch games to your PC via USB or network
All in one emulator on Android!
Sandbox video game with a powerful physics engine
Desktop/Android/HTML5/iOS Java game development framework
A cross-platform PSP emulator
A simple and easy-to-use library to enjoy videogames programming
A J2ME emulator for Android
An iOS & tvOS Frontend for Multiple Emulators
RetroArch is a frontend for emulators, game engines and media players.
GemRB is a portable open-source implementation of the Infinity Engine
The game engine for everyone
The source code to VVVVVV
One framework for creating powerful cross-platform games
Open source cross-platform multi-purpose game toolkit
The AWS GameKit Plugin for Unreal
Open source HTML5 game framework that offers WebGL and Canvas
RenderDoc is a stand-alone graphics debugging tool
Open source voxel game engine with support for survival and crafting
Memory Efficient Serialization Library
scene-oriented, flexible 3D engine (C++, Python, C#, Java)
A dead simple 2D game library for Go
A habit tracker app which treats your goals like a Role Playing Game