npm

unique-stream

node.js through stream that emits a unique stream of objects based on criteria

is-number

Returns true if a number or string value is a finite number. Useful for regex matches, parsing, user input, etc.

grunt-jsonmin2

Minify your JSON files to save some bandwidth.

grunt-supported-browsers

Shows you what browsers you currently support based on your browserlist config.

node-zopflipng

Native module for zopflipng