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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.
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berty
Berty is a secure peer-to-peer messaging app that works with or without internet access, cellular data or trust in the network
You can try it out here and read more about it and check the repository out here
Thank you for the kind words! Firefox is not fully supported, because of two things: - no support for WritableStream (used for downloading the files). Read more here - not supporting system audio capture at all Non of this is breaking though, and file downloading still works, but it might be a little slower.
Sounds similar to Berty