PHP version of Google's phone number handling library
Open-source event-driven AI powered Softphone
Open source CSTA library
The most affordable CRM system according to Capterra
CM8200/SB8200
VAP 4641
Java VoIP Softphone (SIP) (replaced by jfPhone)
Scan all CISCO phones in your LAN to get their information
Enterprise telephony recording and retrieval system
Multi user address book application accessable through the web.
ERP, IP PBX, Accounting, CRM, Time tracking, and etc.
H.323 Gatekeeper for VoIP and videconferencing
Java VoIP/SIP PBX system (replaced by jfPBX)
OSS project for the Playcast Application