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awesome-selfhosted
A list of Free Software network services and web applications which can be hosted on your own servers
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linx-server
Discontinued Self-hosted file/code/media sharing website. ~~~~~~~~~~~~~~~~~~~ Demo: https://demo.linx-server.net/ [Moved to: https://github.com/andreimarcu/linx-server] (by linx-server)
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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 have checked both awesome-selfhosted and some posts in this subreddit but I have not found a solution where uploads are protected and I may be the only one who can do so.
In their releases it has a linx-genkey you can download https://github.com/linx-server/linx-server/releases/latest eg linx-genkey-v2.3.8_linux-amd64