Socket.io - Realtime application framework (Node.JS server)
Muzzle - Silence embarrassing notifications while screensharing
Smart Tab Mute - Ensures that only one tab is playing sound at the same time
Upscope Screen Sharing for Intercom - No-downloads screen sharing fully integrated with Intercom.
MuteTab - Better tab muting in Chrome
Dead Simple Screen Sharing - Simple screen sharing and audio conferencing software.