WebStorm is the best IDE hands-down for JavaScript developers. Yes, there's more lightweight editors (and nothing beats vim when debugging remotely), but the sheer productivity of WebStorm is unparalleled. React/JSX support? Check. ES2015 support? You bet. Node.js profiling? Yes! Look, if you can't rename a class or variable reliably across a JavaScript project, follow references, debug (without console logs) your editor sucks. Don't use a editor that sucks, use WebStorm!

Writing software, navigating code bases, and refactoring code. Intellisense and click through are heavily used features here.

The best PHP editor available. We really don't know how we managed to do anything before using this fantastic tool.

The best PHP editor. Also is a great MySQL/SQLite datasource browser, text editor, and I think it makes coffee too.

Mailer, forms; anything that I feel PHP can still provide advantages simply AngularJS/MEAN stack

For all our team's coding because of its support of core libraries like angular and ruby on rails

IDE used for development of various web applications and services at Promethean.

Developer's use for editing and developing Javascript projects.

It's really the only PHP IDE to bother with in our experience.

We just use because we love it :)... but is not required.