- qs
A querystring parser that supports nesting and arrays, with a depth limit
- body-parser
Node.js body parsing middleware
- async
Higher-order functions and common patterns for asynchronous code
- js-yaml
YAML 1.2 parser and serializer
- mime-types
The ultimate javascript content-type utility.
- ms
Tiny millisecond conversion utility
- semver
The semantic version parser used by npm.
- winston
A logger for just about everything.
- yargs
yargs the modern, pirate-themed, successor to optimist.
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