Billion PBX - functionally rich software SIP-server intended to create new generation phone systems for corporates and organisations.

Billion Softswitch - VoIP-server with SIP and H.323 protocols support and different media and signaling proxy modes. It is intended to provide flexible transit of VoIP-traffic.

Billion Phone - freeware SIP softphone. Compact convenient application helping you make calls using your computer. One of the most important features is the ability to show customer balance on the screen when working with Billion Softswitch, Billion PBX and some other VoIP-servers.