Here are some links to other to apps written by other people that I think are really cool.
Cro-Mag Rally…Really fun racing game
Prince of Persia…Retro…Great game from the 80’s
Zen Bound 2
Wolfram Alpha…An amazing cool alternative search tool
Live Cams HD, A really cool live WebCam app
Leaf Snap….Take a picture of a leaf and find out what it is
Watch Videos from the distant past with Video Time Machine