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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.
I like to use Obsidian as a super notebook that is also quite simple. To get started with Obsidian you need to download the software from their official website. After installation you can start, Obsidian uses the markdown file format. It's similar to a text file, but it has features such as tags where you can organize the texts. I don't know about you, but I think it's really useful to use Markdown because it's simple to use and helps you focus on developing texts without needing a lot of configuration. To further improve Obsidian, it has extensions that are not official to Obsidian where developers can bring new features to further enrich the software. But the most interesting thing is its second brain feature, where you can connect files via hyperlinks and see relationships between different subjects.