Post River Software
UI Tuner

An iPhone/iPad developers tool for designing and tweaking UI controls. Great for graphic designers too.
Click here for more information.

 

N-Numbers

This is the classic tail number search program, but with a twist. It works in the plane - no cell or WiFi needed.
Click here for more information.

 

iCOPA

iCOPA is the first in a series of remote forum viewers for the iPhone. Click here for more information.