uEngine is an open source BPMS. It was registered in SourceForge.net in 2003, and becomes one of the successful open source BPM projects with matured architecture and references in diverse industries.
uEngine Social BPM is providing the OpenSocial, Facebook and other SNS platforms on it rather than the existing BPM which is supporting on formal process only.
Anyone with a registered user as a friend to make easily a virtual company with unstructured type of process execution. And it supports the environment that concludes a deal(Crowd sourcing) with unknown optimal providers.