Kobo Audiobooks - Experience the joy of being told a story
AudioAnchor - Audio player that tracks the listening process of your audio books and podcasts
Prologue - Audiobook player on iOS for Audiobooks hosted on a Plex media server
Scribd Audiobooks - Unlimited access to 30,000 audiobooks
Smart AudioBook Player - Smart AudioBook Player app comes up with features to help you in casting all your audiobooks to Chromecast enabled devices so you can enjoy them with your friends and family members.
Audible Plus - 1000s of audiobooks, podcasts, Audible Originals, and more