Flexible routing and re-routing between anything that can speak over Websockets. A dynamic interface that allows changes and provides feedback in real-time. Online and local accessibility. Supported libraries and example scripts. A growing tutorial library. Jam Session hackathons hosted by LAB at Rockwell Group. Open-source and completely free.

Participad is a WordPress plugin that allows multiple people to edit the same WP content at the same time. Powered by Etherpad Lite, Participad gives you:

Notepads, for collaborative notetaking
Synchronous authoring of any content in the WordPress Dashboard
Front-end editing

OpenSubdiv is a set of open source libraries that implement high performance subdivision surface (subdiv) evaluation on massively parallel CPU and GPU architectures.