The calculator is useful for calculations of isentropic flow, normal- and oblique-shock relations as well as Prandtl-Mayer expansions. The layout originates from the compressible aerodynamics calculator written in javascript by Dr. W.J. Devenport at the Dept. of Aerospace and Ocean Engineering at Virginia Tech.
(see http://www.aoe.vt.edu/~devenpor/aoe3114/calc.html).

Wind-tunnels

Wind-tunnels and facillities at NASA Langley : 1, 2

Wind-tunnels at Nasa Ames

Wind-tunnels at Nasa Glenn (formerly Nasa Lewis)

Shock-tubes

The T5 hypervelocity shock tunnel facility at Caltech

Centre for Hypersonics, University of Queensland, Australia
(including a photo of the world's fastest champagne corke...)