freepbx - FreePBX is a web-based open source GUI that controls and manages Asterisk (PBX).
PixelFed - PixelFed is a federated image sharing platform, powered by the ActivityPub protocol.
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.
Gab - Gab is an ad-free social network dedicated to free speech.
Asterisk - An open source telephony switching and private branch exchange service for Linux.
Friendica - Decentralisation - Privacy - Interoperability