- js-yaml
YAML 1.2 parser and serializer
- mkdirp
Recursively mkdir, like `mkdir -p`
- fs
- postcss
- commander
the complete solution for node.js command-line programs
- mongodb
The official MongoDB driver for Node.js
- debug
small debugging utility
- mocha
simple, flexible, fun test framework
- ws
Simple to use, blazing fast and thoroughly tested websocket client and server for Node.js
- Top 12 Jupyter Notebook extensions