calibre - Ebook manager, viewer & converter
MP3 Converter - Mp3 Converter is a free to use as YouTube to MP3 converter that allows you to convert and download YouTube to MP3, MP4, F4V and 3GP formats.
FBReader - FBReader is an e-book reader for various platforms. Features:
Absolute Audio Converter - Absolute Audio Converter is an award-winning audio converting software.
Google Play Books - Google Play Books lets you search, preview, and buy millions of books using Google Book Search.
Kingshiper MP3 Converter for Mac - Kingshiper MP3 Converter for Mac is the best audio converting software that can convert audio/video files to MP3, WAV, M4A, AAC, WMV, FLAC, and other formats at a fast speed.