Linkello - Video calls simplified, no installation required.
OpenTok - Build a custom video experience using our robust APIs, or add plug-and-play video to your website in minutes using Video Chat Embeds. Start Building for FreeTalk to SalesTalk to Sales .
jTorchat - jTorchat stands for Java Torchat, and is a complete rewrite of the popular p2p IM messenger Torchat
Twilio Video - Real-time video infrastructure and SDK
Signal - Fast, simple & secure messaging. Privacy that fits in your pocket.
Agora - A special place for your podcasts