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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 recently switched to an ultrawide and found the minimal tiling (corners only) available by default in Plasma to be insufficient. After lots of searching, I found this Github (https://github.com/lucmos/UltrawideWindows). It's also available if you search for Ultrawide in the KWin script section of Settings. It does all the things I want with quasitiling on an Ultrawide, chiefly, big 50% window in the middle, 2 25% windows on the sides, just like Windows PowerToys.