A Calendar app for Nextcloud
Store, manage and access all your passwords with ease.
A multi-format browser-based ebook reader which supports EPUB, PDF and CBR/CBZ
A multi-format browser-based ebook reader, supports EPUB and CBR/CBZ
Ebook viewer that supports EPUB/CBZ/PDF
https://addons.mozilla.org/de/firefox/addon/ocdownloader-extension/
Text recognition for your images
A pdf viewer for Nextcloud