Visual Understanding Environment : The Visual Understanding Environment (VUE) is an Open Source project based at Tufts University. The VUE project is focused on creating flexible tools ...
iPlotz : Wireframing, mockups and prototyping for websites and applications
Sonar : Sonar is an open platform to manage code quality.
Inkscape : Inkscape is a professional vector graphics editor for Windows, Mac OS X and Linux. It's free and open source.
PhpWiki : PhpWiki is a clone of the original WikiWikiWeb
TileMill is an application for making beautiful maps