Podfanatic.com - Discover your new favorite podcast
Arvocast - Arvocast is an audio podcast player for mac that operates in the menu bar and supports many popular services like SoundCloud, iTunes, Spotify, and others.
Podda.io - Podda is a podcast discovery tool that you can use to discover podcasts by guest.
podStation Podcast Player - A minimalistic chrome extension for subscribing and listening to podcasts.
AdBarker - Dynamic ad insertion service for your podcast
Vox Pods - Podcast discovery app