Open source HTML5 game framework that offers WebGL and Canvas
Open-source Android/Desktop remake of Civ V
Desktop/Android/HTML5/iOS Java game development framework
A simple and easy-to-use library to enjoy videogames programming
Open source library for creative expression on the web, desktop, etc.
Action-adventure game originally released in 2013
Open source library for N64 development
A completely free, open-source, 2D game engine
Android, UIQ 3.0, Series 60 Edition 5 open-source software
Gideros Release version
Use the Delta Executor APK with Roblox on a Windows PC.
Examples of procedural geometry for Unity3D C#
Source of Mana is a unique 2D MMORPG
A multi-purpose file manager for the Nintendo Switch
Flex roguelike
Map creator for the BattlleTech MUX
Flash Quiz TV (A quiz game for all family)
Asphyre is a cross-platform framework for Delphi and FreePascal.
The Atomic Game Engine is a multi-platform 2D and 3D engine
Massively multiplayer online game server and client framework
Open-source, cross-platform, C++ game engine for creating 2D/3D games
Open Game Bootstrap
Kids Games in Flash
Cross platform administration tool for Source Engine dedicated servers
Android/Flash educational children's games