Game emulator recommendations?

FTR I posted a link to a site that lets you play in Nintendo games from a browser window only. If the site hasn't been shut down by the big N in the many years it's been available, I dont see a problem with sharing it.

These arguments only incite undue hatred and indifference, where we should all be a metal fucking brotherhood not some gaggle of in-fighting elitist bungholes. Get along, please....all this holier-than-thou witch hunt shit has got to stop. Have a Coke and a smile, all that.