jQuery tagtacular is a Flexible and easy-to-use jQuery plugin that makes it easy to add, edit, remove tags with flexible customization options.
jQuery & jQuery UI Plugin For Simle Tokenized Autocomplete - Autocomplete Multiselect
jQuery Plugin To Create 3D Sphere-style Tag Cloud - tagcloud
Animated jQuery Tag/Token Input Plugin - masterblaster
Easy Tagging / Tokenizing System with jQuery - mtag
Flexible jQuery Tags Management Plugin - tagtacular
Easy Tags Manager Widget With Autocomplete Support - Tag-It
Minimal Tags/Tokens Input Plugin For jQuery - FancyMe Tags