gPodder.net is looking for a new maintainer!
If nobody comes forward by 2020, it'll be forced to shut down. Please boost to spread the word.
Note that this is the podcast-sharing website: I'm not sure about the status of the app, but I think that's still doing fine.
Fosstodon is an English speaking Mastodon instance that is open to anyone who is interested in technology; particularly free & open source software.