The Free & Popular FLARUM Web Software in a Complete Virtual Machine
Simple PHP setup for HTML5 Videochat web application by VideoWhisper.
H.323 Gatekeeper for VoIP and videconferencing
SIP Video Multiconference Media Server with WebRTC support.
A multifeatured virtual webcam software to broadcast over the Internet
It can add a chat room with Flash & HTML 5 Client into SMF.
eSports tactical drawing board
A XMPP client written in java
A Skin for Mumble
Low cost interactive whiteboard for GNU/Linux