A team at Indiana University created Scholarometer to "facilitate citation analysis and help evaluate the impact of an author's publications." The crowdsourced data created through the Scholarometer platform is available through the Scholarometer API that allows developers to track certain authors through name, citation, disciplines, relevance, and other metrics.
Your next meal could be served up by BigOven's new API. The comprehensive service for those who like to cook provides more than 170,000 recipes in XML or JSON format (our BigOven API profile). From there, you can display it however you want, though there's a yet to be determined fee for commercial applications.