Soundslice sells animated sheet music and associated software.
Amateur guitarists rely on a notation called guitar tablature ("tabs") to learn new songs. But this format is horrible to learn from on its own; you end up having to listen to the song just to get a sense of how to play it. Soundslice solves that pain point by marrying tabs with a real recording.
On soundslice.com, you can create and view these animated tabs for any YouTube video. We also sell high-quality tabs for indie artists, and we license our technology to music-education companies.