This site combines geologic information with Virtual Earth 3D maps to create a colorful and informative view of the topography of several western states. 

If you have either questions or answers, use this Mechanical Turk application to get matched. Earn up to three cents per answer. 

An Atlas using Google maps. Upon querying a country, the map locates the country, it provides a list of useful links to learn about the country in question, and a aggregation of news from major RSS providers, filtered by country in Yahoo pipes. 

This is a mashup showing the capitals of the fify states of the United States and the respective state nicknames 

A mashup using two StrikeIron APIs, Zip Code Information and Population Demographics By ZIP Code, plus Yahoo Maps to give detailed information for a specific US zip code. 

WowCity.com is a mashup thats also lots of things wrapped into one easy to use website. The site provides search functionalities to find business listings and classifieds within a city and also an accounts system for members and business advertisers. 

This Google Maps mashup shows countries through which the equator passes. 

DBpedia Mobile maps DBpedia locations and allows users to explore background information about them by navigating into DBpedia and other interlinked datasets such as GeoNames, Revyu, EuroStat and Flickr. Supports 14 languages and various filters. 

Great mashup that asks the question: If I dig a very deep hole, where I go to stop? Pick a spot on the map and it shows you the opposite location on the globe. Very fun. 

Point-and-click time zone locator. Find what time and date it will be anywhere in relation to a reference location and time. Use EasyTZ to schedule conference calls and plan meetings across TimeZones.