VLC Media Player - VLC is a free and open source cross-platform multimedia player and framework.
Spotify - Map shows when two people play same song at same time
ncmpcpp - Ncurses Music Player Client (Plus Plus)
SoundCloud - Enjoy music & follow favourite artists
musikCube - A fully functional terminal-based music player
Last.fm - The world's largest online music service. Listen online, find out more about your favourite artists, and get music recommendations, only at Last.fm