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SurveyJS
Open-Source JSON Form Builder to Create Dynamic Forms Right in Your App. With SurveyJS form UI libraries, you can build and style forms in a fully-integrated drag & drop form builder, render them in your JS app, and store form submission data in any backend, inc. PHP, ASP.NET Core, and Node.js.
I agree with the others: Visual Studio Code ist the best right now, even if u/ReddyFreddy- is right: ISE is preinstalled. But then I usually can access the servers via network share and edit the files.
I'll also mention Sublime Text... It's a text editor, not a development environment, so it doesn't really compete with VS Code or the ISE. But there's a PowerShell module for syntax support, and it's a fantastic text editor in general. I'm constantly using Sublime for all sorts of stuff, and often pop open PowerShell files just because I've already got Sublime up and running.