I almost forgot, my tiniest open source project might be my most-visited. When I first started playing with Java (late '96) I posted a small maze applet. That bit of code ended up being linked to a lot of kid's pages, and earns me charming notes from the little tikes, saying things like "you suck" and "you need color". Perhaps I should have built the maze applet out a bit more, but that wasn't the original point.