Plug - Lightweight OSX player for Hype Machine
Scribd Audiobooks - Unlimited access to 30,000 audiobooks
Magic Playlist - Get the playlist of your dreams based on a song
BookPlayer - Player for your DRM-free audiobooks. Contribute to TortugaPower/BookPlayer development by creating an account on GitHub.
Playlist Hunt - Playlist Hunt is one of the best applications for Apple users to get the best music through it.
Channels by Audible - Follow handcrafted interest-based playlists.