The People's Republic of Casiotone
While surfing, i stumbled across the website of Five Minute Walk Records, which produces several rad alternative bands. What I found was that the site was under renovations, so in its place, the keen folks at FMW had put a piano keyboard . Not just a graphic, mind you, but an actual keyboard, recalling those beautiful bygone days of the mini-Casio keyboard. Go ahead, peck away at it; the eighties flashback is great.
And if you're skilled, you can reproduce several favorite 8-bit video game theme songs. I've already wasted about twenty minutes trying to play the Super Mario Brothers theme.