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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.
Github has been mentioned, I personally use it in combination with Obsidian, since it supports Latex among others, it works great with math notation. See on of my repositories. So you're notes are plain text files anyone can read, even without Obsidian.
Github has been mentioned, I personally use it in combination with Obsidian, since it supports Latex among others, it works great with math notation. See on of my repositories. So you're notes are plain text files anyone can read, even without Obsidian.