Ocean beta - Make music with friends in your browser
Microsoft Visual Studio - Microsoft Visual Studio is an integrated development environment (IDE) from Microsoft.
iO-808 - Rhythm composer modeled after Roland's TR-808 drum machine.
IntelliJ IDEA - Capable and Ergonomic IDE for JVM
Music Box Fun - Make and share music box songs online
Xcode - Xcode is Apple’s powerful integrated development environment for creating great apps for Mac, iPhone, and iPad. Xcode 4 includes the Xcode IDE, instruments, iOS Simulator, and the latest Mac OS X and iOS SDKs.