Pluot Communications - Big-screen video conferencing for startups
Linkello - Video calls simplified, no installation required.
Closer - Digitize your sales team | Video calls for sales
jTorchat - jTorchat stands for Java Torchat, and is a complete rewrite of the popular p2p IM messenger Torchat
Callpage - Turn website visitors into sales calls. Use CallPage and provide immediate free phone callback to your leads in 28 seconds.
Signal - Fast, simple & secure messaging. Privacy that fits in your pocket.