This web site allows you to play many of your favorite classics! It also allows you to download video game emulators. An emulator allows you to duplicate the function of one system using another system. You can download these emulators and play classic games on your computer. They offer a ColecoVision Emulator, and a Nintendo Emulator.
http://www.tripletsandus.com/80s/80s_games/arcade.htm

The Emulator Zone is another website that offers many different emulators including: NES, Sega, Arcade, Sony, and Atari.

http://www.emulator-zone.com/