Tonometric.com: Neuroscience-based musical tests and population stats. Transcribe! - software to help transcribe recorded music. The Transcribe! Application is an assistant for people who want to work out a piece of music from a recording, in order to write it out, or play it themselves, or both. It doesn't do the transcribing for you, but it is essentially a specialised player program which is optimised for the purpose of transcription.
It has many transcription-specific features not found on conventional music players. GNU Solfege - free ear training software.
Harp.