From Joomla! Documentation
Joomla! 3.9.0 is the latest version! Info on all Joomla! CMS Versions Technical requirements for Joomla! 3.9.0 Find out what's new in Joomla! CMS 3.9 Answers to common questions about Joomla! CMS 3 Take an extended test drive and build your own free Joomla! website Always use a supported version, read our release and support cycle page.
Find a JDOC Project Here are a few in need of contributors. Help Screens Project Beginners Tutorial Project Developer Tutorials Project