##Elgg
Elgg is a flexible and customizable social network engine based on php. The elgg community has developed lots of plugins adding all kinds of capabilities to the system. Therefore only a selected subset of features that we chose for our installation is covered here.
Git Repo: https://github.com/elgg/elgg
##Gnu Social
GnuSocial is an open source solution for federated social networks. It is a merger from StatusNet, GNU FM and FreeSocial. The social interactions of Gnu.Social have been analysed based on the popular quitter.se instance.
Git Repo: https://github.com/foocorp/gnu-social
##Pump.io
Is a federated social network software with a focus on mobile devices and an activitystreams API written based on node.js.
Git Repo: https://github.com/e14n/pump.io
