Asterisk - An open source telephony switching and private branch exchange service for Linux.
Servetel - Communication management solution
FreeSWITCH - FreeSWITCH is an open-source media application designed to support popular protools such as SIP and WebRTC and provides a platform to develop voice and video applications.
EVS7 Inside Sales software - EVS7 Inside Sales software is a platform that allows users to manage their team, power dial their prospects, and can track all of their results, The platform helps users to nurture their leads, accelerate their sales, and they can do all this from a…
FusionPBX - FusionPBX is an open source FreeSWITCH GUI.
Outreach - Outreach Is Your Sales Communication Platform