JavaScript Code Style checker : jscs is a code style checker. jscs can check cases, which are not implemented in jshint, but it does not duplicate jshint functionality, so you should...
hunt : Library to detect when DOM elements become visible and disappear on scroll.
Cypress : JavaScript End to End Testing Framework. Fast, easy and reliable testing for anything that runs in a browser.
SSL Server Test : This free online service performs a deep analysis of the configuration of any SSL web server on the public Internet.
Enzyme : Enzyme is a JavaScript Testing utility for React that makes it easier to assert, manipulate, and traverse your React Components' output.
A passive reconnaissance tool inside the DOM (experimental)
