Iconpicker for Bootstrap is a simple icon picker.   It's very simple to use. You can have a beautiful

Scrollorama is a jQuery plugin for doing cool scrolly stuff.  It will take almost any HTML elements ( including

JSONmate is a JSON editor component for you web apps/pages. You can beautifier/uglifier your JSON code and edit it directly in a tree view editor,

Selectik is jQuery plugin, easy use, cross-browser alternative to the standard select form element which can be customised with CSS.

Gridster.js is a jQuery plugin that makes building intuitive draggable layouts from elements spanning multiple columns. You can even dynamically add

vTicker is a jQuery plug-in that adds scrolling vertical tickers to your site. Just one line of javascript code is all you need to

Smint is a simple jQuery plugin that helps with the navigation on one page style websites. It

ingrid is an unobtrusive jQuery component that adds datagrid behaviors like column resizing, paging, sorting, row and column styling (and

Foggy is a jQuery plugin for blurring page elements. It supports IE (8 and up), Firefox, Safari and Chrome.  

jQuery Upvote is a plugin that generates a voting widget like the one used on Stack Exchange sites.