- readable-stream
Streams3, a user-land copy of the stream library from Node.js
- qs
A querystring parser that supports nesting and arrays, with a depth limit
- mime-types
The ultimate javascript content-type utility.
- semver
The semantic version parser used by npm.
- bluebird
Full featured Promises/A+ implementation with exceptionally good performance
- chalk
Terminal string styling done right
- colors
get colors in your node.js console
- crypto
- yargs
yargs the modern, pirate-themed, successor to optimist.
- Top 12 Jupyter Notebook extensions