Jitsi (formerly SIP Communicator) is a free and open source multiplatform voice (VoIP), videoconferencing and instant messaging application.

Campfire helps you easily collaborate online in real-time.

Glasscubes helps businesses improve how they manage projects, share files and collaborate online.

Google Voice is a telephony service that provides call forwarding and voicemail services, voice and text messaging, as well as U.S. and international call ter…

Echoplexus is an anonymous, web-based, IRC-like chatting platform that makes its best effort to respect your privacy.

GoMeetNow is an online web conferencing service.