Underscore.string is a string manipulation helpers for javascript. Originally started as an Underscore.js extension but is a full standalone library nowadays.
Underscore is a JavaScript library that provides a whole mess of useful functional programming helpers without extending any built-in objects.
Collect.js is a convenient and dependency free wrapper for working with arrays and objects.
Classie is a lightweight script that allows you to add, remove, toggle, and check for classes in the DOM easily.
