Openwhyd - Collect and Share the tracks you love.
Vinyls - Vinyls is a music player that lets you listen to your music without any complicated setup.
SoundClick - SoundClick is a music-based social community.
Plexamp - A small music player with a number of unique features
Zoff - Collaborate on a live music and video playlist with your friends.
SoundCloud Charts - The most played tracks on SoundCloud this week