multi.js is a user-friendly replacement for select boxes with the multiple attribute. It is mobile-friendly, easy to use, and provides search functionality. multi.js is also easy to customize and style with CSS.
pickList is a simple jQuery plugin that turns a regular multiple option select box into a side-by-side pick list with Bootstrap.
jQuery Tree Multiselect is a jQuery plugin that allows you to replace a
select element with a treeview element. It's a multiple select with nested options.
Select Multiple is an user-friendly drop-in replacement for the standard select with multiple attribute activated.
Selectivity.js is a modular and lightweight selection library for jQuery and Zepto.js.
Checkbox-field is a jQuery plugin that turns multiselect fields into a field of checkboxes
SumoSelect is a jQuery single/multi select plugin which can be used on almost any device. It can be fully customizable using simple css properties.
Select3 is a modular and lightweight selection library for jQuery and Zepto.js
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.