RASAero

RASAero is a combined aerodynamic analysis and flight simulation software package for model rockets and high power rockets, amateur rockets, and sounding rockets. RASAero can also be used for predicting aerodynamic coefficients for use in other flight simulation programs for orbital rockets.
The RASAero aerodynamic prediction methods are the most accurate available for model, high power, and amateur rockets, and are of equivalent accuracy to professional engineering method aerodynamic analysis codes used for missiles, sounding rockets, and space launch vehicles. Get RASAero and take it for a spin to see what it can actually do for you!