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.
surveyjs.io
featured
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snapcraft.io
Discontinued The official website's repository for the Snap store [Moved to: https://github.com/canonical/snapcraft.io] (by canonical-web-and-design)
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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.
Technically, it hasn't been "proprietary" for a long time. snaps came out in 2014 or so. Snapcraft.io (aka "the backend") has a github repo with commits going back to Aug 16, 2017.
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Hence, a higher number means a more popular project.