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rgraph
Backend with superpowers. Supercharge your web applications with Authentication, Database, GraphQL and serverless functions right from day zero.
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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.
If you just want to see the code. Here is the code base for this article. Here you can see more examples. This is the open-source software behind Rocketgraph
If you just want to see the code. Here is the code base for this article. Here you can see more examples. This is the open-source software behind Rocketgraph