The Google Maps Elevation Java Library by Jam3 allows developers to integrate the Google Maps Elevation API into their Java applications. Usage examples are provided. This Library is offered under the MIT License.
The Health team at Bing used public data to create a Health Map application (requires Silverlight) that lets users visualize a number of health indicators, such as obesity and premature births, by U.S. county.
With a domain like map.pr, you'd think this would be another link shortener. Instead, it uses the Foursquare API to give you a great way to visualize popular places on FourSquare. And, if you're following the World Cup, you can also use Mappr to find spots frequented by fellow fans.