VLC Media Player - VLC is a free and open source cross-platform multimedia player and framework.
Sigil - Sigil is a multi-platform WYSIWYG ebook editor. It is designed to edit books in ePub format.
foobar2000 - An advanced freeware audio player for the Windows platform.
Jutoh - Epub editor, convertor and creator software for Mac and PC.
Winamp - Winamp is a media player that allows users to play multiple-file formats, arrange media in a varied file-management system, and play unique media with AAC encoding.
WLPPR - Beautiful mobile wallpapers made from satellite imagery