- async
Higher-order functions and common patterns for asynchronous code
- mongodb
The official MongoDB driver for Node.js
- winston
A logger for just about everything.
- q
A library for promises (CommonJS/Promises/A,B,D)
- bluebird
Full featured Promises/A+ implementation with exceptionally good performance
- qs
A querystring parser that supports nesting and arrays, with a depth limit
- mkdirp
Recursively mkdir, like `mkdir -p`
- mocha
simple, flexible, fun test framework
- glob
a little globber
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