Game Maker
Size:  3.12 MB
Players:  N/A
Game Maker
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This, of course, isn't one of my games.  It isn't a game at all, but as the name suggests it is a tool to make games.  Instead of lines and lines of code, you just drag and drop simple operations into the right order and you can do anything you want.  It isn't as powerful as DarkBASIC or any other programming language, but its ease of use makes it worth a look.  I like it so much that my "Centipede" clone, which I started in DarkBASIC, has been converted to Game Maker.