The most affordable CRM system according to Capterra
Unified Communications Server
Enterprise telephony recording and retrieval system
H.323 Gatekeeper for VoIP and videconferencing
Cress is a comprehensive toolset for graphical service/workflow design
Java VoIP/SIP PBX system (replaced by jfPBX)
JAvascript Voicexml InterpretER
A simple noise gate app intended for use with VOIPs like Skype.
Universal Framework to audit Voip protocols's security
Send Asterisk CDR to serial device
Go to github.com/vlm/asn1c for the latest version.
Optimized and cross platform SMPTE 2022 FEC library in C, Python, Java