Visual Beat - Interactive music video
Flixier - Flixier Pro is an online video editor that speeds up your workflow with 1 minute rendering on any device, streamlined communication and collaboration features and plenty of cloud storage.
The Lucid Realm - Listen to music in 3D
Spark Camera - Make memorable videos
Google Music Lab - Interactive experiments that use the Web Audio API
Showbox - Showbox helps you to create studio quality video in minutes.