Before you is the best online Synthesizer (a piano of all times and peoples! I decided to find and put some kind of "toy" on the site, but I could not even imagine that I would be hooked so much myself! I could hardly distinguish the sound from the real one! Once I set it up I played 2 hours, since then I also play at work sometimes.
Free virtual synthesizer with nine different instruments: piano, organ, saxophone, flute, pipe, strings, guitar, xylophone, double bass and six different drum tracks to boot.
Virtual synthesizer program does not pretend to seriousness, the resulting music is not saved. But entertainment in general is not bad. For the game, either the keyboard (middle row of buttons) or the mouse is used.