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koreader
An ebook reader application supporting PDF, DjVu, EPUB, FB2 and many more formats, running on Cervantes, Kindle, Kobo, PocketBook and Android devices
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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.
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Calibre Web
:books: Web app for browsing, reading and downloading eBooks stored in a Calibre database
Check out koreader for Kobo devices. I've been using it for a quite some time and it adds some nice Calibre features such as wireless sync. Besides that the PDF support is leaps ahead of stock Kobo
https://github.com/koreader/koreader
I prefer calibre-web[1] and it is under active development.
[1]:https://github.com/janeczku/calibre-web