GOG or Good Old Games has been around the abandonware scene for some time. Now, they have gone legit with their operation. You can purchase old games for as little as $5.99. They have old greats like Fallout, Simon the sorcerer, and a whole lot more for sale, and all compatible with XP or Vista - DRM-free!
I know that a lot of people know about GOG by now, but I just want to post this to show my support for the company's DRM-free policy. I plan to buy Fallout 2 in a couple of months. But first, I'm trying out Beneath a steel sky just because it's for free right now.
