Visual Beat - Interactive music video
VLC Media Player - VLC is a free and open source cross-platform multimedia player and framework.
YuMe - A multi-screen video advertising company providing digital video brand advertising solutions.
foobar2000 - An advanced freeware audio player for the Windows platform.
SoundViz - Turn music and sounds into beautiful art
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.