Metronaut - An app to help you play classical music
Draw.Chat - Anonymous real-time whiteboard with text and video chat.
Transposr - A free and simple way to transpose your sheet music or MP3.
Microsoft Whiteboard - The canvas where ideas, content, & people come together.
Flat for Education - The best way to teach music to your students
Explee - Explee allows you to make eyecatching and interactive animated video.