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LockView
Foundry VTT module: Locks the view for the purpose of using Foundry on a digital playmat, such as a horizontally mounted TV. Scales the scene so the gridsize is always displayed corresponding to a real-world size, and can block zooming and panning
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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.
There's Lock View, which I originally made for real life play. It allows you to control what players can see and has multiple other features that might be useful. You specifically might want to take a look at the viewbox option.