I just came across this interesting utility for all JavaScript developers.

From its website:

Taffy DB is a free and open source 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