Taffy DB 
Posted on March 11, 2008
A JavaScript database for your browser
Taffy DB is a free and opensource JavaScript library that acts as thin data layer inside Web 2.0 and Ajax applications.
What makes it cool:
- Under 10K!
- Simple, JavaScript Centric Syntax
- Fast
- Easy to include in any web application
- Compatible with major Ajax libraries: YUI, JQuery, Dojo, Prototype, EXT, etc
- CRUD Interface (Create, Read, Update, Delete)
- Sorting
- Looping
- Advanced Queries
Think of it as a SQL database in your web browser.