TaffyDB is The JavaScript Database. How you ever noticed how JavaScript object literals look a lot like records? And that if you wrap a group of them up in an array you have something that looks a lot like a database table? TaffyDB is a libary to bring powerful database funtionality to that concept and rapidly improve the way you work with data inside of JavaScript.

The file size is small with extremely fast queries. It supports database features such as count, update, and insert. It is robust with cross browser support. It is compatible with any DOM library (jQuery, YUI, Dojo, etc).

Requirements: JavaScript framework
Demo: http://www.taffydb.com/
License: BSD License