Matrix reference homeserver
Java wrapper for the popular chat & VOIP service
Issabel PBX - Unified Communications
VoIP SIP and SKINNY quality analyzer and packet / audio recording tool
Free texting, voice and video calls in any web browser. Your username
Open source Fax server software for inbound / outbound internet Faxing
Open source auto dialer for voice, fax and SMS campaigns
VICIdial call center optimization tools, monitoring utilities, and per
Modern, AI-Smart, WASTE p2p for ipv4, Tor and i2p + Voice Conference.
Convert VoIP calls to text and analyze them with AI
Unified communications framework and REST API for developers
Unified Communications Server
Java VoIP Softphone (SIP) (replaced by jfPhone)
Free software and hardware for telephony
High performance, production quality STUN server and client library
VoIP/SIP Autodialer
Kazoo Live Medium. From Null to a Full Featured PBX on minutes
Accent interfaces and controls systems through goals and policies