This piano keyboard is quite simple and user-friendly. It gives you the possibility to play the piano online using your mouse or your computer's keyboard. Also gives you excellent piano training online.
This virtual piano is based on the HTML Web Audio API. You can record your piano notes and play them again. Various piano samples are provided.

Flash Version:
It gives you the possibility to play the piano, organ, saxophone... online using your mouse or your computer's keyboard.
This is an online virtual music machine with piano, organ, saxophone, flute, pan pipes, strings, guitar, steel drums, double bass. 
You can overlap several drum beat by clicking or unclicking the corresponding buttons.