Планетонавтика как она есть
Ссылка php.net
The language that Joomla! is developed in
Ссылка MySQL
The database that Joomla! uses
Ссылка Ohloh Tracking of Joomla!
Objective reports from Ohloh about Joomla's development activity. Joomla! has some star developers with serious kudos.