Select2 is a jQuery based replacement for select boxes. It supports searching, remote data sets, and infinite scrolling of results.
MagicSuggest is a multiple selection auto suggest combo box for Bootstrap 3.
This is a user-friendlier drop-in replacement for the standard with multiple attribute activated.
A combobox plugin
Listbox.js is a simple jQuery plugin that provides a more powerful alternative to the standard `select` tag
A plugin to present multiple select elements in easier way.
A jQuery plugin that is a shuttle box ui.
jQuery plugin to have a touch-fitted multi select input field..
dropList is a lightweight jQuery plugin to custom UI style for drop down list. The plugin has droplist, multilist and combo list (search and dropdown) options