External Libraries in Joomla
From Joomla! Documentation
Mootools[edit]
"1.4.5 with 1.2 compatibility layer" - Joomla 2.5 1.4.5 - Joomla 3.0 - Present
Mootools More[edit]
jQuery[edit]
1.8.3 - Joomla 3.1 - Present 1.8.1 - Joomla 3.0 - 3.0.3
jQuery UI[edit]
(Core, Widget, Mouse, Position, and Sortable) 1.8.23 - Joomla 3.0 - Present
Bootstrap[edit]
2.3.2 - Joomla 3.1.2 - Present 2.1.0 - Joomla 3.0 - 3.1.1