I was messing around with CoffeeScript and Jasmine this evening and put together a very small library called Extractor. Here's the idea:

Everyone hates the global object in JavaScript, and care must be taken to manage potential variable name conflicts. Extractor works as a proxy for the global object, allowing library developers to register their libraries without touching the global object. Developers who use the library can then extract it into a variable name of their choice, possibly never touching the global object at all. The effect is similar to jQuery's noConflict function, but is used more like Node's require.

For more information (including usage examples), check out Extractor on GitHub.