jQuery has lots of plugins and jQuery UI to improve its functionality in many ways.

Ninja UI is a plugin for the framework that brings new alternatives to them in a single package.

It includes widgets like buttons, accordion, icons, tooltips/modal box, slider, rating, tabs, auto-suggest and canvas-powered loader icon.

Ninja UI

They are unobtrusive and the icons used actually come as a separate plugin that is in the form of web fonts.

P.S. Its documentation is not complete yet but the source of the examples are pretty self-explanatory.

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