Spotify - Map shows when two people play same song at same time
VLC Media Player - VLC is a free and open source cross-platform multimedia player and framework.
Black Hole - An open source music streaming app
foobar2000 - An advanced freeware audio player for the Windows platform.
PSST - Fast Spotify client with native GUI, without Electron, built in Rust.
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.