1. Joomla!

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

| 82 hits

2. Joomla! - Forums

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

| 85 hits

3. MySQL

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

| 81 hits

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.

| 86 hits

5. OpenSourceMatters

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

| 86 hits

6. php.net

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

| 83 hits