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.
Voice - Convert texts to audio files easily... Write your text, click export.
LibriVox - free public domain audiobooks
Chronicle Audiobook Player - Audiobook player on Android for audiobooks hosted on Plex media server.
OverDrive Media Console - Download eBooks and audiobooks from your library directly to your iPhone, iPad, and iPod Touch!
Prologue - Audiobook player on iOS for Audiobooks hosted on a Plex media server