nanoid
A tiny (118 bytes), secure URL-friendly unique string ID generator
unique-username-generator
A package to generate a unique username from email or randomly selected nouns and adjectives. User can add a separator between the username, define the maximum length of a username and adds up to six random digits.
password-generator
Memorable password generator. For the command line, Node.js and the browser.
chance
Chance - Utility library to generate anything random