Miniflux is a minimalist and opinionated feed reader.

QuiteRSS is a open-source cross-platform RSS/Atom news feeds reader written on Qt/C++

FreshRSS is a free, self-hosted RSS aggregator. It is quite lightweight, fast (it can manage +100k articles without complaining) and powerful (e.g. shortcuts, filters, responsive design, multi-views, multi-themes, multi-users, statistics, provides a Google Reader API, etc.)

Only for Mac and IOS, but really good! It's open source and free. It can sync with Newsblur, Feedbin, and others. Using the Mac app also allows me to select multiple stories.

Obsidian has an RSS plugin and has recently been updated. The update makes it much, much more usable! I can make a list for the RSS stories I wanted to save on that day.

I gave this one a go on a whim and honestly I really like it! Open source BUT IS NOT FREE. I've been using the trial and I enjoy it! I think it also has a training feature like Newsblur does?

Pros:

• Nice interface
• Open source
• Can sync with NNW
• Has a web app (and a PWA I think)
• Gives an email for signing up for newsletter and converting them into RSS.
• Tags
• The feed seems to go much further back than Newsblur

Cons:

• Can't tag individual stories like with Newsblur
• Can't select all, but I may be able to do that through an app

Pros:

• Open source
• Freemium
• Training
• Tags, and can tag individual stories.
• Notes I think?
• Web app
• It has kind of an ugly UI, but honestly it's ugly in a charming sort of way?

Cons:

• Some feeds only show like one story when there are a lot more in the feed.
• Can't select all
• Problems with syncing with NetNewsWire

Fast & free RSS feed reader as a browser extension for Chrome, Vivaldi, Edge, Brave and Firefox for reading blogs, news or any RSS, Atom or RDF based feed.

Self-hosted and open source, but Docker really, really doesn't like me for some reason and just was not working.

Besides, I don't know if I want a self-hosted feed reader, since it seems much more convenient to have one online.

One of the most popular but not open source. Has a web app.

Aggregate RSS, newsletters, and social feeds with advanced filtering, real-time cross-device syncing, customizable reading views, and ad-free experience.

Newsboat is a fork of Newsbeuter, an RSS/Atom feed reader for the text console. The only difference is that Newsboat is actively maintained while Newsbeuter isn't.