AntHill key features:

• Network abstraction layer under TCP/UDP/Shared Memory
• Standard scaling and fail-overing algorithms
• Extensible architecture and API
• Full tread-safe and STLPort is supported optionally
• Windows, Mac OS X, Linux are officially supported
• Open Source and fully free for use and deploy
• Documentation, tutorials and code snippets free and easy accessible
• Commercial support is available
• And more...