These are the podcasts I listen to regularly and would recommend. Most are technology oriented, focussing on software development. There is some great solar punk content and other decentralized stuff.
If your looking for a nice simple podcast app for Android, take a look at podlisten. It's super simple, auto downloads new episodes and consumes rss feeds for updates. I'm pretty sure it's basically abandonware at this point though. It is available on f-droid, which is nice. If you have any open source recommendations for listening to podcasts, send me some mail.