React Select is a flexible select control for React with multiselect, autocomplete, async support.
Tokenize2 is a jQuery plugin that allows you to select multiple items from a predefined list or ajax, using autocomplete as they type to find each item.
Tag-it is a jQuery UI plugin to handle multi-tag fields as well as tag suggestions/autocomplete.
Taggle.js allows you to create tag fields within your forms, to allow for easy and optionally restricted, input from your users.
inputTags.js is a simple jQuery plugin allowing to add, edit or remove tags in a tags list.
Insignia is a customizable tag input that is progressively enhanced, fast, easy to use, and reliable.
Tagator is a jQuery-based replacement for input boxes, making them tagging boxes. It supports searching, and affects the original input box directly, which is used as a comma serparated data container.
Tag Editor is a powerful and lightweight tag editor plugin for jQuery.
taggingJS is a jQuery plugin to create an high customizable front-end tag system. It is less than 2.5 kb and support major browsers in the world!
Tag Manager is a jQuery plugin to create tag input fields, which works nicely with Bootstrap.
jQuery.masterblaster is a nice and tidy tag manager.
jQuery tag/token input plugin for Twitter Bootstrap.
Bootstrap Tags Input is a jQuery plugin providing a Bootstrap user interface for managing tags.
MagicSuggest is highly flexible auto suggest combo box in the line of Bootstrap themes. It is many configuration options that you can customize.
Inputosaurus Text is a jQuery plugin that allows for multiple delimited values, parse hooks, autocomplete, keyboard shortcuts etc.