[sciurius]

Looks very impressive, but it shares a major drawback with most music editors: it forces the user to operate in a specific context, e.g., adding notes of a specific duration. When you want to enter a melody, you frequently need to switch the context (e.g., select another note duration) and this interrupts the flow of the melody in your head.
With a tool like NotateMe, you write what you want to write.