

I have personally been very happy with FreshRSS. Nowadays I use Nextcloud News (just a Nextcloud) app for it. So if you already have Nextcloud you don’t even need to selfhost something extra.
They both have WebApps. FreshRSS has a few themes to fit your taste and Nextcloud News will obviously follow your Nextcloud theming.
As far as apps go, FreshRSS has (probably) more than Nextcloud News. I personally like Feeder (only in PlayStore but worth it imo). For Nextcloud there is an App with the same name. Also good imo, but FreshRSS/Feeder has more customization options.
EDIT: Here is a nice list of a lot of Feed Readers: https://github.com/awesome-selfhosted/awesome-selfhosted#feed-readers
Not sure how decent yet, but got recommended Beyond Compare at work, which is a trial software and recently discovered it runs on linux.
It’s basically a file compare tool, but can also compare images and looks really nice.
It also features, like on Windows, really handy entries for the right click menu of pretty much all popular Linux File managers.
I just bought a standard license for version 5, because it seems awesome and I wanna use it more.