koreader

URL

https://github.com/koreader/koreader

An absolutely fantastic piece of libre software for reading ebooks.

I have it installed on my Kobo.

The top features for me:

• Night mode. White text on a black background for reading at night. Amazingly you don't get this on default OS for the Kobo.
• Wallabag plugin. You can download all your articles from Wallabag as epubs to read.
• OPDS catalog plugin. You can connect to a remote OPDS catalog and download books from there. I connect it to my Calibre-Web instance.
• Highlights. I use this a lot. Nothing too fancy but it does the job. It's quite nice the way it handles when a highlights spans multiple pages. I use KoHighlights to get the highlights on to my computer for processing.
• Book Map is also nice.