- bluebird
Full featured Promises/A+ implementation with exceptionally good performance
- rimraf
A deep deletion module for node (like `rm -rf`)
- cheerio
Tiny, fast, and elegant implementation of core jQuery designed specifically for the server
- async
Higher-order functions and common patterns for asynchronous code
- mocha
simple, flexible, fun test framework
- readable-stream
Streams3, a user-land copy of the stream library from Node.js
- fs
- superagent
elegant & feature rich browser / node HTTP with a fluent API
- express
Fast, unopinionated, minimalist web framework
- Top 12 Jupyter Notebook extensions