If you’ve been feeling a little nostalgic lately, you might want to check out Abandonia.com which has a nice listing of abandonware DOS games. The listings are organized by category and each allows for a rating, gives compatibility info, and has a short bit of text about the game.
There’s nothing like a good game of Castle adventure to take you back to the 80s.
Abandonware is a bit of a grey area, but here are two more sites:
http://www.freeoldies.com – It’s down at the moment but it’s a pretty good abandonware search engine.
http://www.the-frenchkiss.biz – Lots of stuff you won’t find elsewhere. Anyone remember Lost Eden?