NextPlane - NextPlane offers cloud-based, scalable unified communications federation service for the enterprise.
Zoho Meeting - Free video conferencing, online meeting, desktop sharing solution from Zoho.
Voxer - Turn your phone into a Walkie Talkie. Don't waste time on phone calls and voicemails.
Airtime - Hang out with group video, share music & videos
Sameroom - Chat interoperability-as-a-service
Voxox CloudPhone - Get a local or toll-free business number that automatically answers, routes and transfers calls, plus other professional business phone services.