Simple to use, blazing fast and thoroughly tested websocket client and server for Node.js
Higher-order functions and common patterns for asynchronous code
A logger for just about everything.
Tiny, fast, and elegant implementation of core jQuery designed specifically for the server
A library for promises (CommonJS/Promises/A,B,D)
A deep deletion module for node (like `rm -rf`)
YAML 1.2 parser and serializer