The most popular API, in terms of mashup count, is far and away the Google Maps API, which accounts for 41% of all mashups. But when it comes to the most popular pair of APIs, Flickr and YouTube mashups are the most common. Not to be outdone, Google Maps joins Flickr in a near second place.
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.
For music fans and concert goers, having instant access to information on which bands are playing where is definitely a plus. Being in the know and never missing out when it comes to great gigs in your area is even better. In comes new Facebook mashup, Fanbible; a live music event guide that works on android, iPhone, iPad and desktop browsers, keeping users informed even when they're on the go.