Magisto - Magisto online video editor is a fast & powerful video maker. Turn your photos and video clips into video stories with Magisto movie editor. Start free!
Visual Beat - Interactive music video
Kudoflix - A new video editor made for all. The only movie maker that gives Professional results without spending time or money learning or rendering.
The Lucid Realm - Listen to music in 3D
Kizoa - Kizoa is an Online Movies and Videomaker application that use photos, videos and music to design and stunning stuff.
Google Music Lab - Interactive experiments that use the Web Audio API