VICIdial Contact Center Suite
Web based system for Computer Assisted Telephone Interviewing (CATI)
Unified Communications Server
Cellular manager for mobile phones/modems
Cress is a comprehensive toolset for graphical service/workflow design
GNU Telephony Services and Applications
Universal Framework to audit Voip protocols's security
Send Asterisk CDR to serial device
Go to github.com/vlm/asn1c for the latest version.