Sigil - Sigil is a multi-platform WYSIWYG ebook editor. It is designed to edit books in ePub format.
VLC Media Player - VLC is a free and open source cross-platform multimedia player and framework.
Vellum - Free beautiful hand-curated wallpapers for the iPhone
AIMP - AIMP : Free Audio Player : Официальный сайт программы
Pressbooks - Create books: print and ebooks
foobar2000 - An advanced freeware audio player for the Windows platform.