Xash3D FWGS engine
Godot is a powerful cross-platform game engine
A cross-platform PSP emulator
Open source cross-platform multi-purpose game toolkit
Desktop/Android/HTML5/iOS Java game development framework
One framework for creating powerful cross-platform games
Voxel game-creation platform with easy modding and game creation
Stream switch games to your PC via USB or network
Multi-platform Engine for Desktop, XBOX (UWP) and Mobile games
Cocos simplifies game creation and distribution with Cocos Creator
Free, cross-platform 2D game engine powered by Haxe and OpenFL
RetroArch is a frontend for emulators, game engines and media players.
Open-source Android/Desktop remake of Civ V
Open source library for creative expression on the web, desktop, etc.
The game engine for everyone
Cross-platform game engine in Rust
Do virtual gear shifting (and more) in any rider app
A dead simple 2D game engine for Go
A habit tracker app which treats your goals like a Role Playing Game
Action-adventure game originally released in 2013
4 players Breakout game
GLScene Engine for Delphi & C++Builder VCL Windows 32/64
3D Engine c++
GEDKeeper - opensource and crossplatform genealogy management program