ooVoo is a video communication service that enables people to call and connect over the Internet. ooVoo’s video and audio service is available to anyone with a computer, broadband connection and a web camera, for real-time video calls with up to six friends, relatives and colleagues simultaneously.

The company also provides a video chat service that includes video conversation recording, telephony, video messaging, instant message chat and file sharing.

Linkify is a managed multi-company collaboration system that facilitates project management, process automation, and repository collaboration.

SlideShare is a community for sharing presentations on the web

VMukti Meeting Place is an open source web conferencing company that allows web, audio/video phone, Skype, MSN and Yahoo! users to participate in live web conferences by adding a piece of code to their websites to create an online conference room.

Via Techcrunch

ConceptShare is online design collaboration software that lets users "create shared visual workspaces that can be marked up and chatted in."

Via Techcrunch

Thinkature is collaboration software designed to provide "a fast and free way to collaborate around a design proccess."

Source: Techcrunch