Codacy - Automatically reviews code style, security, duplication, complexity, and coverage on every change while tracking code quality throughout your sprints.
BundlePhobia - Find the performance impact of adding a npm package to your bundle.
JavaScript Operator Lookup - A full list of JavaScript operators with examples
JavaScript.com - A free resource for learning and developing in JavaScript
JavaScripting - Ranking of top JavaScript libraries, frameworks, and plugins
aijs.rocks - A collection of AI-powered JavaScript apps