Ask HN: 24 Hour Open Source Projects?

I've been in a creative mood lately, and usually that means giving myself a menial programming task to accomplish over a day or two. However, I don't really have anything I need to make right now. I figure somebody must have some small programming jobs they haven't had time to complete, and if anything it gives me an opportunity to pick up some new technology or framework. I know Perl, C, Python, SQL and various scripting/markup languages. My requirements are no payment and that the result be open source licensed, and the time needed to complete be no longer than a weekend.