Unified Communications Server
H.323 Gatekeeper for VoIP and videconferencing
Webface witch extract CDR (Call Detail Records) from MySQL base.
Cyber-wrt pbx is embedded system in DD-Wrt router
Graph active VoIP calls on Google Maps.
GSM L1-L3 stack with SIP network interfaces
Web interface for OpenSIPS
C++ SIP stack based on Chrome source code