I don't know if it's permanently dead or not but I really like QuiteRSS:

https://github.com/QuiteRSS/quiterss

Last update was 4 years ago; I don't know if this means the project is dead or merely "done." One of the last features added was the ability to share a news item to Hacker News:

https://github.com/QuiteRSS/quiterss/issues/1084#issue-33248...

I have used this app on Windows and macOS; I've installed it on Linux but I don't do daily work on Linux so I don't know if it's stable there or not.