X Plane Aircraft Construction Center
Plane Maker tutorial by Tobb Bergland.

DreeseCode Software
The home of John Dreese's DesignFOIL software .

Incomplete Guide to Airfoil Usage
If you're working on reproducing a design but don't know what airfoil it uses, the
answer is probably here. Part of the UIUC airfoil data site.

UIUC Airfoil Data Site
Public access airfoil section shape database.

On-LIne NACA or DHMTU Airfoil Calculator
Java app. for instant airfoil data gen.

Aviation Engines Page
Discussion data, and links for those interested in aircraft engines, both certified and uncertified.

GE Transportation Aircraft Engines
GE turbofan engine data

X Foil
X Foil airfoil analysis software home page.