Interactions
Draggable
Droppable
Resizable
Selectable
Sortable
Widgets
Accordion
Autocomplete
Button
Datepicker
Dialog
Progressbar
Slider
Tabs
Effects
Color Animation
Toggle Class
Add Class
Remove Class
Switch Class
Effect
Toggle
Hide
Show
Utilities
Position
About jQuery UI
Getting Started
Upgrade Guide
Changelog
Roadmap
Subversion Access
UI Developer Guidelines
Theming
Theming jQuery UI
jQuery UI CSS Framework
ThemeRoller application
Theme Switcher Widget

jQuery UI source code is hosted on GitHub.

http://github.com/jquery/jquery-ui

If you're new to git, start with our guide: How to submit a fix to jQuery UI – The Easy Way, which shows in 6 easy steps how to submit a fix to jQuery UI without learning a bit of git.

For more advanced users of git, here are some recommendations:

  • Fork the jQuery UI repo
  • Commit changes to your fork
  • Keep separate changes in separate topic branches
  • If you want us to review and like your fixes, follow our bug fixing guide and in particular our commit message style guide.
  • Use git rebase to maintain a clean history
  • Submit a pull request when your changes are ready for review