The project uses:
Over 30 "WhApps" (all written in ERlang)
RabbitMQ AMQP Message Bus
Kamlilio SIP Proxy
Freeswitch SIP Media Server
Here is a link to the 2600hz.org github repo for Kazoo 3.0:
We will be contributing all of our code back to this community, and I would like you to manage the pull requests and use the developer forum at https://groups.google.com/forum/#!