Remote Clan - Community to discuss, learn and grow remote work.
Asterisk - An open source telephony switching and private branch exchange service for Linux.
Remote | Workers - Create a profile and get hired by 1000s of remote companies
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.
Presence.so - Push-to-talk voice chat for remote teams
freepbx - FreePBX is a web-based open source GUI that controls and manages Asterisk (PBX).