Apprentice Alf's DeDRM Tools - Everything you ever wanted to know about DRM and ebooks, but were afraid to ask.
Sidify Apple Music Converter - Sidify Apple Music Converter is a popular tool used to convert Apple Music, iTunes M4P music and audiobooks to MP3/AAC/WAV/FLAC/AIFF/ALAC. It keeps lossless audio quality and ID3 tags after conversion.
DRMBuster - DRMBuster is a powerful all-in-one audio and video conversion software for any kind of purchased or legally obtained music and video.
OpenAudible - OpenAudible Project Page
Sidify Music Converter - Sidify Music Converter for Spotify is a popular tool used to convert Spotify music to MP3/AAC/WAV/FLAC/AIFF/ALAC. It keeps original audio quality and ID3 tags after conversion.
TuneFab Apple Music Converter - TuneFab Apple Music Converter enables you to convert Apple Music, iTunes music and audiobooks to MP3/AAC/WMV without DRM protection.