A very light, easy to use program used to help you learn some songs on several instruments such as the guitar, flute, piano, bass, violin, and a few others. If you have played Guitar Hero or Rock Band, you'll know exactly what to expect. Comes with some default songs built-in to learn, but I would recommend buying the editor as well, as that seems to be the only way to add in songs of your choosing. It even comes with a built-in tuner, which was unexpectedly nice.
One of the game modes, "Learning Mode," will stop the song at each note and will not progress the song until you play the note on your accompanied instrument. I imagine this works quite well for instruments such as the piano or the flute. However, as a beginner violin player, I find this gamemode to be very picky. Perhaps it is my technique, or maybe my microphone is not a good quality one, but I find that I have to play a single note a few times for the song to continue, as the program registers my notes as either a flat or a sharp and I have to split the atom to get the correct pitch. I won't hold this against the game, though, as I'm probably just trying to convince myself I'm secretly not terrible.
Ending on a high note, Songs2See is a very sound program overall. It measures up to my expectations. Take a minuet to give it a try.