Pitch Ability Test - Test your Pitch Ability. Measure your pitch take over and pitch retention abilities. Know where you stand on the road to Absolute Pitch. Especially, measure the criteria: Accurately sing a named note without a reference.
Spotify - Map shows when two people play same song at same time
GitHub Audio - Tracks events across GitHub to generate calming work music
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
AudioSwift - Use your trackpad as a MIDI controller.
SoundCloud - Enjoy music & follow favourite artists