Dingtone - Dingtone is a free call and texting application for making unlimited calls and text messages to any number at the moment registered in any part of the world by any cellular company.
Opencast - Opencast is an open source solution for automated video capture and distribution at scale.
Textnow.com - It lets you text your friends, aka my only source of happiness
Amazon Elastic Transcoder - Amazon Elastic Transcoder is media transcoding in the cloud.
FluffyChat - Open. Nonprofit. Cute ?
Telestream - Telestream offers video capture, encoding, transcoding, and network-based delivery.