Do you like Super Mario Brothers but don't currently own a Wii or DS? Then check out http://www.supermariobrothers.org/ which gives you the chance to play fan-made games based on the famous franchise. And when I say based on, I mean "almost exactly the same in every possible detail." You can either download games or play flash versions on the site. I've played the download version and it is superb though I do sometimes struggle playing it with a keyboard instead of a controller. The games are a lot of fun and get me my nostalgia fix for free. Take a look for yourself.