pomelo
Pomelo 是基于 Node.js 的高性能、分布式游戏服务器框架。它包括基础的开发框架和相关的扩展组件（库和工具包），可以帮助你省去游戏开发枯燥中的重复劳动和底层逻辑的开发。Pomelo 不但适用于游戏服务器开发， 也可用于开发高实时 Web 应用，它的分布式架构可以使 Pomelo 比普通的实时 Web 框架扩展性更好。
官网:
源代码:
https://github.com/NetEase/pomelo
kbengine
一款开源的游戏服务端引擎，使用简单的约定协议就能够使客户端与服务端进行交互，使用KBEngine插件能够快速与(Unity3D, OGRE, Cocos2d, HTML5, 等等)技术结合形成一个完整的客户端。
服务端底层框架使用c++编写，游戏逻辑层使用Python(支持热更新)，开发者无需重复的实现一些游戏服务端通用的底层技术，将精力真正集中到游戏开发层面上来，快速的打造各种网络游戏。
(经常被问到承载上限，kbengine底层架构被设计为多进程分布式动态负载均衡方案，理论上只需要不断扩展硬件就能够不断增加承载上限，单台机器的承载上限取决于游戏逻辑本身的复杂度。)
官网:
http://kbengine.org
源代码:
https://github.com/kbengine/kbengine
demo源代码:
unity3d : https://github.com/kbengine/kbengine_unity3d_demo unity3d : https://github.com/kbengine/kbengine_unity3d_warring ogre : https://github.com/kbengine/kbengine_ogre_demo html5 : https://github.com/kbengine/kbengine_html5_demo
Unity3d插件:
https://github.com/kbengine/kbengine_unity3d_plugins
firefly
Firefly is a free, open source, stable and rapid expansion, to "hot update" distributed game server side framework。Written in Python, based on the Twisted framework development。Firefly's design philosophy is to "let developers focus on front-end"，It includes a development framework and database caching services, and other basic services game servers，Save a lot of game developers working hours，Truly allows the user to focus on gameplay logic。It can be used to build a custom distributed architecture, only need to modify the configuration file to the appropriate。
官网:
http://9miao.com/
源代码:
https://github.com/9miao/firefly
scut
Scut is a free, open source, stable game server framework, which support C#/Python/Lua script, and support Unity3d, Cocos2dx, FlashAir client access.
官网:
http://www.scutgame.com/
源代码:
https://github.com/ScutGame/Scut