Plug.dj - With the world constantly at war with itself, and with barriers being put into place between people, it sometimes seems as though there is nothing that can unify the human species. Read more about Plug.dj.
Iomoio - Iomoio is an all-in-one music solution that allows you to play and download the world’s best music tracks.
Jamendo - Jamendo app is a free Android music player that allows you to download and listen to music legally for free on your mobile device.
TheSixtyOne - TheSixtyOne is a music streaming site that allows users to stream and download unlimited mp3 tracks.
Songr - Windows XP/Vista/7/8, freeware, 5 MB. Portable version · Songr 2 player. Songr 1. Note: Songr does not index nor host any mp3 files, it's just a desktop interface to third party mp3 search engines.
Spotify - Map shows when two people play same song at same time