WolframAlpha
The #1 reference app on iPad, bar none!
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Wikihood for iPad
Great for finding things that are located around you. Rich in history, especially if you are on the East Coast
Real Estate by Zillow – Search Homes for Sale or Apartments for Rent
Great RE app even if the housing values are way off, as are the pointers to the address of the houses on the map
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Edmunds – New & Used Cars Search
iPhone app but I use it on my iPad because it’s still the best source for car values
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3D4Medical Images & Animations
Just an amazing display of medical images, really shows off the iPad!
