Plugin for entering and validating international telephone numbers
Matrix reference homeserver
VoIP/SIP SoftPhone (formerly known as jphonelite)
Browse on Tor/i2p, Anon p2p Chat / FileTx, Conf / Video VoIP
VICIdial call center optimization tools, monitoring utilities, and per
Open source Fax server software for inbound / outbound internet Faxing
Software per Call Center
Unified Communications Server
Java VoIP Softphone (SIP) (replaced by jfPhone)
High performance, production quality STUN server and client library
Online Internet Phone Call Center Software For Telesales Team
Accent interfaces and controls systems through goals and policies
Multi user address book application accessable through the web.
(Pakistan) Trace mobile numbers to their name and address.
H.323 Gatekeeper for VoIP and videconferencing