The simply the best collection of JS loader scripts
A JavaScript file and module loader optimized for in-browser use, but it can be used in other JavaScript environments like Rhino and Node. Using a modular script loader like RequireJS will improve the speed and quality of your code.
jRespond is a simple way to globally manage JavaScript on responsive websites. It holds a list of user-defined functions that are fired based on the browser's width compared to a list of customizable breakpoints.
Browserify lets you require(modules) in the browser by bundling up all of your dependencies.