Plone : Plone is a free and open source content management system built on top of the Zope application server.
Tiki Groupware/CMS : Tiki Wiki CMS Groupware is a free and open source Wiki-based content management system and online office suite written primarily in PHP and distribute...
pyo : pyo is a Python module written in C to help digital signal processing script creation.
The CMS Matrix : CMSmatrix lets you easily compare the features in over 1200 content management system products. Check the boxes next to the software you're interested...
DokuWiki : DokuWiki is a simple to use and highly versatile Open Source wiki software that doesn't require a database.