BsMultiSelect is a lightweight multiselect plugin for Bootstrap 4. It converts multi-select list into dropdown with checkboxes.
SelectPage is a jQuery select plugin including ajax remote data, autocomplete, pagination, tags, i18n and keyboard navigation features.
SelectListActions is a jQuery plugin that allows you to perform several actions with HTML Select lists.
Ergo Menu is a jQuery dropdown menu plugin that takes a regular UL
list and transforms it into either an expanding menu, or standard dropdown menu.
Dropdown is a lightweight jQuery dropdown plugin that supports key/value search and has multiple selection option.
Select2 Cascade is a jQuery plugin to create cascading /dependent select list by using Select2 - one of the most popular select list plugin.
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.
vDrop is a minimalistic and customisable jQuery plugin to replace standard HTML select dropdowns.
Pretty Dropdowns is a simple, lightweight jQuery plugin that converts <select>
drop-down menus into "pretty" menus that you can style using CSS. As an extra bonus, it does its best to keep the menu options within the viewport.
Choices.js is a lightweight, configurable selectbox / text input plugin. Similar to Select2 and Selectize.
With Simple Select you can create custom styled select elements by using css and jQuery.
Nice Select is a lightweight jQuery plugin that replaces native select elements with customizable dropdowns.
Searchable Option List is a jQuery plugin which enhances your <select>
HTML elements and makes the options searchable. It works for regular option lists as well as those marked as multiple
Quick[select] is a jQuery plugin for quick selection of common options in select boxes. Quick[select] uses the browser's native select list for its overflow, meaning it will work great on all devices.
A tutorial about creating custom select elements with unique style. It's created by using jQuery and CSS.