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.
EasySelect is a jQuery plugin to present multiple select elements in easier way.
Selectator is a jQuery-based replacement for select boxes. It supports searching, and affects the original select box directly, which is used as the data container.
A tutorial about building a script that is going to take an ordinary select element, and replace it with a better looking, markup powered version, while keeping all the functionality intact.
Dropdown with multiple checkbox select created by using jQuery. Easy to use and adapt.
This is a nice animated custom select by using CSS3 and jQuery. CSS3 transitions and transforms are used to create this animated select.
ajaxComboBox is a jQuery plugin for creating a text box it can "autocomplete" and "pulldown select".
fuzzyDropdown converts a select box into a fuzzy searchable dropdown.
fuzzyDropdown proxies your interactions to the underlying
select box. Also, the dropdown is fully navigable via arrow keys.
Some inspiration for styling a custom version of the select element. There are many possibilities and ideas of how to let the user select a choice in style.
Multi Column Select is a simple plugin that will hide the select control and then display a multicolumn dropdown (css). Uses the original form control so will work if JS is not enabled and the form can be processed as normal.
Flexselect is a jQuery plugin that turns regular select boxes into Quicksilver-like, flex-matching, incremental-finding controls.
Select or Die is a jQuery plugin to style/replace