WebRTC - WebRTC is a free, open project that enables web browsers with Real-Time Communications (RTC) capabilities via simple JavaScript APIs. The WebRTC components have been optimized to best serve this purpose.
Teem - Cloud-based meeting room booking system
Voxer - Turn your phone into a Walkie Talkie. Don't waste time on phone calls and voicemails.
AgilQuest - AgilQuest is a powerful workspace and meeting room booking software that delivers organizations with a central platform from which to find and reserve conference rooms.
NextPlane - NextPlane offers cloud-based, scalable unified communications federation service for the enterprise.
BOOKMEETINGROOM.COM - Book Meeting Room - Conference & Meeting Rooms Management