Sugar is a Javascript library for working with native objects. It is designed to be intuitive, unobtrusive, and let you do more with less code. Sugar is similar to Prototype in that it adds methods to native Javascript objects. However, it doesn’t carry any of the weight of classic browser-oriented frameworks (ajax, DOM manipulation, inheritance, etc.).

Sugar is similar to Underscore.js in that it is intended as a support library for “functional” programming. However, it takes a very different tack with what and how it chooses to implement. Sugar modifies native objects, and is more concerned with intuitive syntax, whereas Underscore.js leaves native objects alone, and is more oriented toward performance.

Sugar will never overwrite methods that already exist, and so is safe to include in any of your pages. It can be opted in over existing frameworks like Prototype, YUI, and MooTools, adding in only the extra bits of sweetness.

Requirements: Javascript Enabled
Demo: http://sugarjs.com/
License: License Free