OpenAudible - OpenAudible Project Page
RoxyApps eBook Conversion Tool - Convert djvu, epub, fb2, lit, azw, lrf and other eBook files to txt, pdf, pdb, rtf and other formats
DRmare Audio Converter - DRmare Audio Converter for Windows is a complete audio DRM removal tool designed to convert both protected audios, including Apple Music, Audible audiobooks, iTunes music, and common audios to MP3, WAC, FLAC, M4A, AAC, etc.
Epubor Ultimate - Designed for those people who want to read books more freely, without limitation.
TunesKit Audible AA/AAX - Audible AA/AAX Converter by TunesKit is an application that enables you to convert audible AA and AAX files to the formats that are supported by other devices.
TuneFab Audible Converter - TuneFab Audible Converter is a cross-platform application that enables you to remove or bypass DRM protection from your audible eBooks.