https://gpodder.github.io/
Podcast client started in 2005 with a proven, mature codebase. Also a web service (gpodder.net) and a podcast feed parsing library.
gPodder and related projects
The gpodder.net webservice
gpodder
The gPodder podcast client.
Detlef Gpodderson. An Android podcast application for gpodder.net.
gPodder 4 for Android Packaging
gPodder 4 Core Library
gPodder 4 for Sailfish OS Packaging
gPodder 4 QML UI Reference Implementation
Collaboratively-maintained gPodder website
Android App to play podcasts and sync with gpodder.net
gPodder Podcast Feed Best Practice Guidelines