Godot is a powerful cross-platform game engine
One framework for creating powerful cross-platform games
All-In-One program that combines multiple Fortnite Dev Account tools.
Updated emulator of Forgotten Realms: Unlimited Adventures
Mad Vandal's FortressCraft Mod Source Code
XNA based game engine completely written in c#
Pear3DEngine is a modern and modular 3D development framework
An extensible development framework for roleplay games.
A cross-platform OpenGL based lightweight scenegraph library
Create your own online real-time browser-based MMO in your website
DREAM is an Open Source GCS