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.
Yarn
Fast, reliable, and secure dependency management.
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