Somewhere out there is a singer-songwriter who could use your code. And who knows, that artist--or one of the other more than 10,000 on ArtistData--might even pay you for it.
ArtistData is a site to help musicians store their information and reach out to fans in the shortest amount of time. For example, enter tour dates once, then publish to MySpace, your website and send local media alerts.
When Zappos released its API, there was a strange restriction: no mobile applications. While sometimes lawyers write terms that aren't formally enforced, Zappos made it clear on its API mailing list that it was serious. Soon, the restriction will be removed and mobile applications will be allowed without written approval.