An MVVM & Databinding framework that can use C# and Lua
Unity / XNA game patcher and plugin framework
Framework to facilitate communication in the Unity game engine
A framework to build Pokémon RPG games
Simple and powerful Unity3d game workflow!
Framework for creating human behaviour experiments in Unity
Official binding of SFML for .Net languages
A tiny, cross-platform, module based web server for .NET
Probabilistic language based on pattern matching
Modern 3D engine and IDE written using C# and C++.
a 2D Game Development Framework
3D .NET engine for Windows, Linux, Mac
Make robots for MediaWiki-powered sites!
Performance enhancement API for RPG Maker XP, VX, VXA.
A generic framework for the generation of game levels.
c# game server framework
Superseded by OpenTK: https://sourceforge.net/projects/opentk/