When you want autocomplete functionality for a search box on your website, this jQuery plugin developed by the open source group at Twitter could be just the ticket. Configuration options include ranking, matching, engine templates, and rendering; plus it’s optimized to search huge databases. The code is on GitHub and you will need jQuery 1.9+ prior to loading. One great feature is how it works well with Right-To-Left (RTL) languages and Input Method Editors (IMEs).