Meet the Pianu: an interactive piano that lives in the browser and helps you practice. It is compatible with any MIDI keyboard. You can also use your computer keyboard to play. The developers also have a roll-out Pianu keyboard, so you can get started with it faster. It acts as a 6-octave piano with the touch and feel of real keys.
With Pianu and the above keyboard, you can start learning new songs quickly. Pianu shows you how to play note by note. You can also play along with tracks. Like what you see? You can find the product on Kickstarter.