Load a score and see the notes turn green as you play them on your MIDI keyboard. Great for learning to sight-read, or for when you are just starting a new piece.
The notes turn green when you have exactly the right notes down, so watch out for rests etc.
Please note that the MIDI sight reader struggles with "swung" music.

*New*
V1.5.2 should work with the new QML plugin framework in the recent nightly build.
Tested on Windows Vista.