Trigraphy - Photo editing app that allows you to make mosaic/abstract looking art.
VLC Media Player - VLC is a free and open source cross-platform multimedia player and framework.
Dreamscope - Make and share 'deep dream' images using dozens of supplied styles or your own.
foobar2000 - An advanced freeware audio player for the Windows platform.
Photomosh - Turn anything into a vaporwave
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.