Joomla.org's Official Site
Joomla Hosting Websites
Joomla Hosting Reviews - Reviews of companies with advice from expert Joomla users.
JoomlaHosting.co - Company information, reviews, advice and comparison guides.
Joomla Hosting - Rankings of the best Joomla Hosts.
Joomla Books (on Amazon)
Extensions We Like
K2 - Content construction kit
sh404SEF - Url and link manager
Xmap - Sitemap manager
Akeeba Backup - backup, restore and migrate Joomla
JotCache - Advanced caching system
NoNumber Extension Manager - Manages extensions made by NoNumber
RS Form Pro - Form creator and manager