Mame - Multiple Arcade Machine Emulator

I've known about this program for many years. It's a arcade machine emulator. What it means is that if you download and install this program and can find ROMs in the underground scene then you can relive great arcade games of old right on your home PC. From Pac-Man, Space Invaders, Centipede, to any of the more modern games. ROM trading is currently illegal but hopefully they will get a clue and we'll all be able to legally purchase and download these old classic games in an iPod like manor sometime in the future. I particularly enjoy finally beating games I pumped hundreds of dollars into back in the day.