Select3 is a modular and lightweight selection library for jQuery and Zepto.js
Benefits
pqSelect is a jQuery select plugin which converts ordinary multiple and single select lists into theme ready jQueryUI widget with support for grouping, disabled options, checkboxes for multiple select lists, radio buttons for single select lists, search box to search options, keyboard navigation and many options, methods and events.
Bootstrap Fullscreen Select is a custom fullscreen select / multiselect for Bootstrap using buttons or User defined elements, designed for mobile devices. This plugin makes it super easy for a user to use the 'select' on small touch screen devices.
jQuery Overlap is a jQuery plugin for detection of overlaps and selections by superposition.
EasySelect is a jQuery plugin to present multiple select elements in easier way.
Dropdown with multiple checkbox select created by using jQuery. Easy to use and adapt.
fieldChooser is a jQuery plugin for selecting from a list of fields or values (the source) and adding them to a new list (the destination).
You move fields from the source to the destination by dragging and dropping with multi-select. Fields themselves can be simple HTML elements or more complex containers.
Bootstrap Multiselect is a JQuery based plugin to provide an intuitive user interface for using select inputs with the multiple attribute present. Instead of a select a bootstrap button will be shown as dropdown menu containing the single options as checkboxes.
Multiple select is a jQuery plugin to select multiple elements with checkboxes. Multiple Select supports methods that allow programmatic control of the component.
Multiselect is a tiny jQuery plugin to customize your <select>
with multiple attribute.
Select2 is a jQuery based replacement for select boxes. It supports searching, remote data sets, and infinite scrolling of results.
Multiselectable jQuery Plugin makes easy to choose multiple items from list with 2 select lists. One with the available options and one for the options that we need to select. It’s been used before but if you are jQuery fan then this is nice (and clean) implementation of the technique.
TabSelect is a plugin to select one or more array or form entries visually, for example to filter a list or replace a multiselect form element.
Chosen is a JavaScript plugin that makes long, unwieldy select boxes much more user-friendly. It is currently available in both jQuery and Prototype flavors.