This is an interesting concept. It has some of the flexibility of a wiki, some of the social elements of a social network, and much of the commonality of a virtual desktop platform. Interesting tool...watch the intro video. It may get you thinking.
"Matterhorn is a free, open-source platform to support the management of educational audio and video content. Institutions will use Matterhorn to produce lecture recordings, manage existing video, serve designated distribution channels, and provide user interfaces to engage students with educational videos. "
Script writing software that is free and web based. Really like the format of the software. Easy to use and forces students to follow proper script format.
If you do any script writing in your classes (for movies or anything else interesting), this is a neat resource. Check out the help section as it provides a brief run-down of the key elements of scriptwriting to serve as a reminder to students.