1. Joomla!

http://www.joomla.org
Home of Joomla!

Monday, 14 February 2005 | Report

2. Joomla! - Forums

http://forum.joomla.org
Joomla! Forums

Monday, 14 February 2005 | Report

3. MySQL

http://www.mysql.com
The database that Joomla! uses

Wednesday, 07 July 2004 | Report

4. Ohloh Tracking of Joomla!

http://www.ohloh.net/projects/20
Objective reports from Ohloh about Joomla's development activity. Joomla! has some star developers with serious kudos.

Thursday, 19 July 2007 | Report

5. OpenSourceMatters

http://www.opensourcematters.org
Home of OSM

Monday, 14 February 2005 | Report

6. php.net

http://www.php.net
The language that Joomla! is developed in

Wednesday, 07 July 2004 | Report