select2

tom-select

+5

Tom Select is a lightweight (~16kb gzipped) hybrid of a textbox and select box. Forked from selectize.js to provide a framework agnostic autocomplete widget with native-feeling keyboard navigation. Useful for tagging, contact lists, etc.

select2

+2

Select2 is a jQuery based replacement for select boxes. It supports searching, remote data sets, and infinite scrolling of results.