Good Reader is a document reader that stands out because it can read mega-sized files (200+ Mb!). The idea is wonderful, but the slow speeds and long load times make this one quite average.

Instaviz is a graph visualization app. It is based on the open source software Graphviz, which is available for the Mac, Windows, and Linux. With Instaviz you can easily draw shapes such as circles, ovals, squares, and triangles, label each, and then connect them to one another. You can then export these to a number of different services, including MobileMe.

Air Sharing is a great memory stick replacement and document viewer