PDF24 PDF Creator - Create PDF and convert documents to PDF for free with the free PDF24 PDF Creator.
OpenAudible - OpenAudible Project Page
PDFCreator - PDFCreator converts every printable document to PDF and many other formats. Create professional PDFs with a few clicks and it's free. With many Professional Features: merge documents, send emails and more.
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.
doPDF - Multi-language. doPDF is the ONLY free pdf maker whose interface is currently available in 33 different languages and has a website translated in 30 languages (and growing, thanks to our translators).
AudKit AAX Converter - Full-featured AudKit Audible AAX converter to download and convert Audible audiobooks to MP3, AAC, M4A, M4B, etc. losslessly.