Asterisk - An open source telephony switching and private branch exchange service for Linux.
EverWebinar - EverWebinar is an automated webinar platform.
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.
Livestorm - Livestorm is browser-based webinar software. We are on a mission to make your webinars simpler and smarter.
freepbx - FreePBX is a web-based open source GUI that controls and manages Asterisk (PBX).
Demio - It’s never been easier to build relationships with your prospects and customers. Join Demio Beta 100% free today. A Smart Webinar Platform on a Simple Mission.