- semver
The semantic version parser used by npm.
- mime-types
The ultimate javascript content-type utility.
- ms
Tiny millisecond conversion utility
- cheerio
Tiny, fast, and elegant implementation of core jQuery designed specifically for the server
- bluebird
Full featured Promises/A+ implementation with exceptionally good performance
- path
- readable-stream
Streams3, a user-land copy of the stream library from Node.js
- superagent
elegant & feature rich browser / node HTTP with a fluent API
- mocha
simple, flexible, fun test framework
- Top 12 Jupyter Notebook extensions