I’ve been kind of bored for the last 2 hours or so, so I created a Sudoku solver! It isn’t particularly efficient, but it does work. Give it a shot! It can also check your solutions or complete partially solved puzzles if you come up with one. All the instructions should be included in the readme. The source code (C++) is included in the zip (60 KB).
http://www.geocities.com/evil_robot70/sudoku.zip
The executable requires Windows 9X/2000/XP to run.