OpenVCS is a open source Video conferencing server that allow up to 64 participants to collaborate with each other at the same times. It uses SIP (RFC 3261, 3GPP TS 24.229) protocol and application framework based on Doubango framework.
Basically OpenVCS uses as a Multipoint Control Unit (MCU) manager and it manage by any number of MCU also known as Bridges where each Bridge can support up to 64 audio/video connections. You can use any SIP compliant device to connect to a bridge as long as the client is RFC 3261 compliant. For example, you can use IMSDroidon Android, iDoubs on iOS (iPhone, iPod Touch or iPad), Boghe on Windows or Linphone/Bria on MAC OS X or Linux.
Download : OpenVCS Video Conferencing Server