What are /r/AudiobookServer's favorite Products & Services?

From 3.5 billion Reddit comments

Thank you for creating the Plex Audiobook Guide. I've only tried it now with just one group of recordings, but it works exactly as hoped. Now if I could only get the Dev. behind Smart Audiobook Player (Android) to modify it to play from a Plex library, then I'll be thrilled. I've used Smart Audiobook Player for many years and it's great. My only quibble with it has been that I wished that it would use cloud storage. If Alex (Dev.) can get behind this, so great. Meanwhile, I'll give Chronicle and PlexAmp a try. Thanks again!