Open source tools

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Get flash to fully experience Pearltrees
http://drupal.org/ Use Drupal to build everything from personal blogs to enterprise applications. Thousands of add-on modules and designs let you build any site you can imagine. Drupal is free, flexible, robust and constantly being improved by hundreds of thousands of passionate people from all over the world.

drupal.org | Community plumbing

ClassTools.net: Create interactive flash tools / games for educa

http://classtools.net/ Create free educational games, quizzes, activities and diagrams in seconds!

Audacity: Fri ljudredigerare och -inspelare

http://audacity.sourceforge.net/?lang=sv Audacity is available for Windows®, Mac®, GNU/Linux®, and other operating systems. Learn more about Audacity...

Enterprise Microblogging

https://www.yammer.com/ Only people with a verified company email address can join your company network. LG Electronics
http://sourceforge.net/blog/

Blog

Adam : Yeah, sure. I guess I’ll start with SourceFabric, who make all the products.
Internet education

SYV-sidor

Your text is saved on the web, and more than one person can edit the same document at the same time. Everybody's changes are instantly reflected on all screens.

MeetingWords: Realtime Collaborative Text Editing

http://meetingwords.com/