VLC Media Player - VLC is a free and open source cross-platform multimedia player and framework.
calibre - Ebook manager, viewer & converter
AIMP - AIMP : Free Audio Player : Официальный сайт программы
FBReader - FBReader is an e-book reader for various platforms. Features:
foobar2000 - An advanced freeware audio player for the Windows platform.
Google Play Books - Google Play Books lets you search, preview, and buy millions of books using Google Book Search.