This post is sponsored by PayPerPost, but I still think it's pretty cool!
Excessively.net is a very cool website that enables visitors to play free games online. They were one of the original sites to offer classic Nintendo games on the web, and they have a large selection of flash games in addition to NES. I love NES games, I used to use emulators to be able to run them on my PC!
Guess I'll have to see how accessible they are through a proxy site for when I'm taking my breaks at work!