Selectize

Selectize is the hybrid of a textbox and <select> box. It's jQuery-based and it's useful for tagging, contact lists, country selectors, and so on. It clocks in at around ~7kb (gzipped). The goal is to provide a solid & usable user-experience with a clean and powerful API. It's a lot like Chosen, Select2, and Tags Input but with a few advantages. Developed by @brianreavis (partly at DIY). Licensed under the Apache License, Version 2.0… so do whatever you want with it! Skinnable. Comes with LESS stylesheets and shims for Bootstrap 2 and Bootstrap 3 (+ precompiled CSS). Interface & make addons like a boss with the plugin system. Fully documented on GitHub & inline. Want to search an item's title and description? No problem. You can even override the scoring function used for sorting if you want to get crazy. Order matters sometimes. Use the and arrow keys to move between items.