About a year or so ago I had to help someone source a POS (Point of Sale) solution for a brew-on-premise wine shop. We evaluated several that we found at download.com, and eventually settled on a $150 piece of software.
Today I found this cheap pos software. It's called D-Pos, and it's a full-featured, DOS-based POS system. That means that it will even work on older computers. While perhaps there is a market for this in developing lands where newer computers are still a luxury, we're at the point now that any small business can easily afford a newer computer that runs XP. Looking at this software, I wouldn't have opted to use it, as a DOS interface just gives the impression of being old and out of date.