Mood Music

Musicovery is an online music service that allows you to find music that matches your mood.

You choose a genre and a mood, such as "dark" or "energetic", and are then presented with various songs that should match, which are interconnected based on their various attributes.

Once you've chosen a specific song, it begins playing and you're presented with a fairly subtle visualisation. You can click on other songs to change the music.

All in all, quite a different, and interesting, kind of music player interface.