Inspection Software Limited (UK)  
   Graphic Software for Inspection
   http://www.inspection.co.uk/isl/

Digital System Resources, Inc.  
   software for sonars.
   http://www.dsrnet.com

Weidlinger Associates, Inc. (USA)  
   PZFlex (software) - The Finite Element Solver for Piezoelectric modeling.
   http://www.wai.com/AppliedScience/Software/Pzflex/pzflex-brochure.html

Field: Ultrasound simulation programs  
   
   http://www.it.dtu.dk/~jaj/field/field.html

Imagine3D Ultrasonic Simulation Software  
   UTEX Scientific Instruments Inc. (USA)
   http://www.utex.com/

Ultrasound Field Simulation  
   Ultrasim is an interactive, menu-oriented simulator for finding the sound field from transducers, primarily for medical ultrasound. Ultrasim can handle 1D, 1.5D and 2D linear and phased arrays, and flat and curved arrays with many different footprints su
   http://www.ifi.uio.no/%7Eultrasim/

TASI Technical Software  
   currently has software tools for the analysis of small signal piezoelectric properties, and large signal characterisation of piezoeoelectric, electrostrictive, ferroelectric, and antiferroelectri
   http://www.tasitechnical.com/products.html

Wave Imaging  
   Software for large-scale wave propagation models.
   http://membres.lycos.fr/waveimaging/

NDTSoft  
   UT Ray Tracing for AutoCAD
   http://www.ndtsoft.co.uk/

Ultrasound Simulator, Ultrasound Ray-Tracing  
   Mike Garton
   http://www.ndt.net/library/applic/mgarton/ut_sim.htm