Csscomb.js
CSS coding style formatter
Stacktrace.js
Framework-agnostic, micro-library for getting stack traces in all web browsers
Prettydiff
Compare code instead of text.
Sinon.js
Test spies, stubs and mocks for JavaScript.
Broccoli
Browser compilation library – a build tool for applications that run in the browser
Shipit
Universal automation and deployment tool written in JavaScript.
Tlapse
📷 Create a timelapse of your web development... or just automatically take screenshots of your hard work ;)
Ampersand
Quickest way to get started with ampersand.
Testcafe
A Node.js tool to automate end-to-end web testing.
Faker.js
generate massive amounts of fake data in Node.js and the browser