You can browse the most-searched queries on Google Hot Trends using search results from Bing. This Google Trends + Bing mashup displays web pages, news results, images and video search results in one page.
If you curious to know how are people feeling around the world, check out World of Emotions - it will help you visualize the global mood through smileys on a Google Map.
With OurSignal, you can scan the most popular tech stories on different social news sites from a common location including Digg, Reddit, Hacker News and Delicious.
Spezify is a new visual search engine that aggregates search results from multiples sources include Yahoo, Flickr, Twitter, Wikipedia, Amazon, eBay, etc. and then arranges all these results in a large beautiful collage.
If you are travelling to another city (or country) and need to know about Facebook friends who may be located in that geographic region, here's how you can see them on Google Maps.
Scribble Maps turns Google Maps into an online whiteboard. You can sketch freehand drawings, insert text, or even paint colored shapes anywhere on the map.
If you are curious to know which states in America or Canada have the highest density of people who have the same surname as you, check out the surname maps at Dynastree.
Search Cube lets you navigate Google search results inside a 3D cube. Search Cubes shows thumbnail previews of up to ninety-six websites, videos and images fetched from Google using your search query.
Nuclear weapons cause catastrophic damage but have you ever wondered what would be the actual extent of this destruction if atomic bombs of various intensity were dropped on some city?
You use del.icio.us bookmarks to save all your favorite links at one place and put tags to describe each of these web pages. Jaxly does the reverse - it helps you discover fresh stories on the web based on your del.icio.us tags.
Learn how to measure distance between any two or more locations on earth using the Distance Measurement Tool of Google Maps.
find bathrooms wherever you're going - type the zip code or the city name.