HEATKEYS

Wikis are simple web pages that groups, friends, and families can edit together. Starting your wiki at Wikispaces is fast, free, and easy.

Scribd is a social publishing site, where tens of millions of people share original writings and documents. Scribd

Search thousands of wikis, start a free wiki, compare wiki software

Online Team Collaboration: shared workspaces for working with colleagues, clients, and partners.

Prezi is the zooming presentation editor

Internet Archive is a non-profit digital library offering free universal access to books, movies & music, as well as 150 billion archived web pages.

ShoutWiki is a wiki hosting service with YOU in mind, so go ahead and express yourself!

Vimeo is a respectful community of creative people who are passionate about sharing the videos they make. We provide the best tools and highest quality video in the universe.

Tiki Wiki CMS Groupware -- A full-featured, open source, multilingual, all-in-one Wiki+CMS+Groupware written in PHP.

Redmine