I've used Product Hunt Collections to create a podcast playlist, although it could use some updates to make it more useful (e.g. mark episodes as "listened to").

Hey everyone. 1,5 year ago we launched Audioknot as a curated audio feed for entrepreneurs. Since that time people are asking about a possibility to curate their own audio feeds. A couple of months ago we have moved to the next step and made an integration with Product Hunt API. Now you can install our Chrome Extension to save episodes while browsing Product Hunt Podcasts page. Then subscribe to your personal feed one time, using your favorite podcast app, and listen to saved episodes. More integrations coming soon. Such as SoundCloud and direct saving from podcast websites. What else should we add? Thanks!