Godot is a powerful cross-platform game engine
Open Source MMORPG Framework
One framework for creating powerful cross-platform games
Desktop/Android/HTML5/iOS Java game development framework
Open source library for creative expression on the web, desktop, etc.
A game framework written with osu! in mind.
Gideros Release version
All-In-One program that combines multiple Fortnite Dev Account tools.
JavaScript framework to build game engines, games, emulators and apps
INSTEAD - Simple Text Adventure Interpreter.
Game engine supporting many 3D/2D formats and graphic effects
2D Game Engine
A cross platform Lua based game engine
Cross-platform 2D and 3D game engine
Build Cross-platform Applications
Asphyre is a cross-platform framework for Delphi and FreePascal.
Open-source, cross-platform, C++ game engine for creating 2D/3D games
3D .NET engine for Windows, Linux, Mac
2D game engine for traditional platform games
Open Game Bootstrap
An advanced flexible game engine for Java.
3D Game Engine
Java decentralized cross-platform network multiplayer game engine