Software

RockSim
A very complete model rocket design and simulation package.
SpaceCAD
Another complete model rocket design and simulation package.
 ContestManager
Standalone application designed to aid Contest Directors in keeping track of points at a National Association of Rocketry (NAR) contest (java based so is OS independent).
 WinRoc
Easy-to-use altitude prediction software, includes motor files and center-of-pressure calculations (freeware).
 TurboCAD LE
Fully functional 2D/3D CAD software. Allows you to create, import and edit .dxf (AutoCAD) files (freeware) Note TurboCAD LE is no longer available directly from IMSI but is still available through TurboCADables. Works with Windows XP only
 OpenRocket  is a free, fully featured model rocket simulator that allows you to design and simulate your rockets before you build and flying them.
 

DoubleCAD XT
Another free fully functional 2D/3D CAD software. Allows you to create, import and edit .dxf (AutoCAD) files that works with Window Vista and 7

 

AeroDRAG
AeroDRAG & Flight Simulation is a computer program that allows the rocketeer to quickly and easily perform rocket drag (Cd) and flight simulations.

 

QCAD
Another CAD software package, avialable in free and profesional versions for Linux, MacOS and Windows.

 

RASAero
Rogers Aeroscience RASAero Aerodynamic Analysis and Flight Simulation Software By Charles E. Rogers and David Cooper