- readable-stream
Streams3, a user-land copy of the stream library from Node.js
- postcss
- mocha
simple, flexible, fun test framework
- commander
the complete solution for node.js command-line programs
- js-yaml
YAML 1.2 parser and serializer
- yargs
yargs the modern, pirate-themed, successor to optimist.
- semver
The semantic version parser used by npm.
- rimraf
A deep deletion module for node (like `rm -rf`)
- handlebars
Handlebars provides the power necessary to let you build semantic templates effectively with no frustration
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