Synthesia

Synthesia is a fun and engaging application that allows users to learn how to play the piano at their own pace. It's especially helpful for those who don't have access to a piano or a music teacher. With Synthesia, users can learn how to play their favorite songs by following along with falling notes displayed on their computer screen. The application has a vast library of songs to choose from, ranging from classical to pop music, and users can even create their own sheet music.

Additionally, Synthesia has several features, such as rhythm training and finger positioning feedback, that aid in improving the user's playing skills. The application also lets users adjust the tempo and key of the song to fit their skill level, allowing them to gradually build their proficiency. All in all, Synthesia is an excellent tool for anyone who wants to learn and play the piano in a fun, digital way.