prelude-ls
prelude.ls is a functionally oriented utility library. It is powerful and flexible. Almost all of its functions are curried. It is written in, and is the recommended base library for, LiveScript.
js-oop
jsOOP aids in object oriented programming in JS.
noot
High quality, well tested, lightweight object oriented toolset for Node.js
bugcore
bugcore is a JavaScript library that provides a foundational architecture for object oriented JS