Feedly★★★☆☆Cloud-based feed reader with all the bells and whistles, focusing too much on the bells and whistles.
Fluent Reader★★★☆☆A simple, no-nonsense, modern-looking RSS/Atom newsfeed reader for Windows, Mac and Linux. Optionally sync with multiple services, but I’ve had issues with Nextcloud.
Liferea★★★★☆A nice, lightweight feed reader for Linux that does the basics.
NetNewsWire★★★★★Clean, stable, fast, free, no-clutter and no-nonsense RSS/Atom newsfeed reader for macOS and iOS.
NewsFlash★★★★★Clean, stable, fast, free, no-clutter and no-nonsense RSS/Atom newsfeed reader for Linux that optionally syncs with multiple services.
Nextcloud News★★★★★Simple web-based news reader for Nextcloud, easy to install and syncs with multiple desktop and mobile clients.
RSS Guard★★★★☆A solid cross-platform feed reader that runs on Windows, Mac and Linux. Extremely capable and customizable. Syncs with multiple services.
Vivaldi (Web Browser)★★★★★Spiritual successor to the original Opera browser, this ultra-customizable web browser can open into a full suite for email, calendar, feeds and more – but only if you want it to.