Playmoss - Create playlists from YouTube, Vimeo and SoundCloud
Scribd Audiobooks - Unlimited access to 30,000 audiobooks
Playlist Machinery - Tools that help you create & organize your Spotify playlists
BookPlayer - Player for your DRM-free audiobooks. Contribute to TortugaPower/BookPlayer development by creating an account on GitHub.
Audioship - Upload audio to YouTube or Facebook
Channels by Audible - Follow handcrafted interest-based playlists.