Namely

All sorts of useful information about every country packaged as pretty little country objects. It includes data from ISO 3166 (countries and states/subdivisions ), ISO 4217 (currency), and E.164 (phone numbers). As a bonus it even adds a country_select helper to rails projects.

NetSuite SuiteTalk API Wrapper

NOTE: This package-manager-friendly version of Chosen is automatically generated from TravisCI. Please send ALL PR's to the canonical Chosen repo:

Deprecated - Chosen is a library for making long, unwieldy select boxes more friendly.

Tokeninput is a jQuery plugin which allows your users to select multiple items from a predefined list, using autocompletion as they type to find each item. You may have seen a similar type of text entry when filling in the recipients field sending messages on facebook.