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The Blocklist Project
These lists were created because the founder of the project wanted something with a little more control over what is being blocked. Many lists out there are all or nothing. We set out to create lists with more control over what is being blocked and believe that we have accomplished that. (by blocklistproject)
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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.
There are lots of great sources for block lists. I used some site a long time ago that helped you build a custom list. I cant find the link but still lots of good sources like : https://github.com/blocklistproject/Lists