Dominating12.com is a site where you can play the board game risk (and variants) online. Apart from playing the occasional match, I'm a volunteer programmer and maintain the site in my spare time.
I started helping out by adding some small changes here and there, but after finishing university my friend and me took a few months to rewrite the entire site. While it definitely isn't perfect, at least it's maintainable and secure. We're still keeping it up to date and adding small changes here and there.