- readable-stream
Streams3, a user-land copy of the stream library from Node.js
- async
Higher-order functions and common patterns for asynchronous code
- mocha
simple, flexible, fun test framework
- semver
The semantic version parser used by npm.
- superagent
elegant & feature rich browser / node HTTP with a fluent API
- debug
small debugging utility
- bluebird
Full featured Promises/A+ implementation with exceptionally good performance
- path
- crypto
- Top Vim plugins