Open source HTML5 game framework that offers WebGL and Canvas
Open-source Android/Desktop remake of Civ V
A simple and easy-to-use library to enjoy videogames programming
Free game engine for development of desktop, mobile, and web games
Desktop/Android/HTML5/iOS Java game development framework
Android, UIQ 3.0, Series 60 Edition 5 open-source software
A fresh & lightweight javascript game engine
Gideros Release version
Use the Delta Executor APK with Roblox on a Windows PC.
Examples of procedural geometry for Unity3D C#
Game engine to build text adventures.
Source of Mana is a unique 2D MMORPG
Amazon Lumberyard is a free AAA game engine
DeSmuME is a Nintendo DS emulator
Map creator for the BattlleTech MUX
Asphyre is a cross-platform framework for Delphi and FreePascal.
The Atomic Game Engine is a multi-platform 2D and 3D engine
Open-source, cross-platform, C++ game engine for creating 2D/3D games
Godot is a fully featured, open source, MIT licensed, game engine.
LEGADEE (LEarning GAme DEsign Environment)
Pack-N-Mine. The mobile Minecraft.
Delphi-like IDE for cross-platform game development