Playlist Hunt - Playlist Hunt is one of the best applications for Apple users to get the best music through it.
Kobo Audiobooks - Experience the joy of being told a story
Book Playlist - Collaborative music playlists for your favorite books
Scribd Audiobooks - Unlimited access to 30,000 audiobooks
Musicon - An interactive music-making machine for children
Prologue - Audiobook player on iOS for Audiobooks hosted on a Plex media server