Yandex.Images - search for images on the internet, search by image
Synthesia - A fun way to learn how to play the piano.
SauceNAO - SauceNAO is a reverse image search engine.
Playground Sessions - Online piano learning game.
Google Images - Google Images is a search service owned by Google that allows users to search the World Wide Web for image content.
Piano From Above - Piano From Above is a program that turns learning the piano into a videogame.