Contrail open source commmunity
OW2 is the main development platform for many Contrail components.
OW2 is an open source community for infrastructure software, hence the natural place for Contrail to use for its software development/
Contrail did also contribute to OpenNebula. and was active in OpenStack.
Contrail developers have an IRC channel at: https://webchat.freenode.net/ called #contrail
ConPaaS has its own open source developer community organised around the web site http://www.conpaas.eu.