https://github.com/imvu-open/istatd/wiki https://github.com/imvu-open/istatd/wiki is my favouite. C++, compile to a binary and then it can send updates in a tre

https://github.com/imvu-open/istatd/wiki https://github.com/imvu-open/istatd/wiki is my favouite. C++, compile to a binary and then it can send updates in a tree of agents to a master node, and maintain a replica of the master, and it does graphs too, everything you need in one.