High Plains Engineering
- Offers tools for flight control system design and flight test simulators, handling qualities, aircraft dynamics, data analysis and tests.
- http://www.flightcontrolsystems.com/

NASA Technical Report Server (NTRS), v 2.0
- Search NASA technical report database. Many reports available online as PDF files.
- http://ntrs.nasa.gov/

JSBSim Flight Dynamics Model
- A free, open source, multi-platform flight dynamics model written in C++. New aircraft models do not require additional code.
- http://jsbsim.sourceforge.net/

RocFlight Rocket Trajectory Software
- Windows based, planar rocket trajectory software for launch vehicles traveling through the standard earth atmospheric model. Includes a database of common high power/model rocket motors, an optimal mass calculation feature, and custom graphing capabiliti
- http://www.rocflight.com

ASTOS
- The Aerospace Trajectory Optimization Software is a tool for solving launcher, reentry and orbit trajectory problems without any programming. ASTOS is a special aerospace model of GESOP, which solves optimization problems using SNOPT or SOCS.
- http://www.astos.de

FlightGear Flight Simulator
- An open-source, multi-platform, cooperative flight simulator development project. Source code for the entire project is available and licensed under the GNU General Public License. The goal of the project is to create a sophisticated flight simulator fram
- http://flightgear.sourceforge.net/

Scientific Engineering Research
- Offers programs for vibration analysis of non-linear rotor-bearing-foundation systems. By linearization in the vicinity of a stable equilibrium position or by direct solution of the non-linear differential equations of motion in the time domain. Detailed
- http://sci-e-research.com/tpak.html

Rotordynamics-Seal Research
- Offers consulting in rotordynamics as well as seal and bearing analysis software for hydrostatic, hydrodynamic, foil, magnetic and rolling element bearings.
- http://www.rsr.com

DARcorporation
- Airplane design, analysis & drafting Software. Also offers consultancy and testing services. List of references and clients. FAQ and evaluation programs.
- http://www.darcorp.com/

Diversified International Sciences Corporation
- Specializing in Air Traffic Control (ATC) Services, Information Technology Services and the Atom System. Provides systems, services and consulting expertise.
- http://www.discmd.com/index.htm

Xpatch
- High-frequency radar signature analysis and prediction software.
- http://www.demaco.com/

Flight Gear Flight Simulator
- Open Source flight simulator. Source code is available here, and it can run on Windows, Linux, Mac platforms.
- http://www.flightgear.org

Satellite Tool Kit
- Analytical engine to calculate data and display multiple 2-D maps to visualize various time-dependent information for satellites and other space-related objects such as launch vehicles, missiles, and aircraft.
- http://www.stk.com/

Flight Dynamics and Control Toolbox
- Matlab/Simulink toolbox for flight simulation, flight dynamics research, and flight control system design. Free downloads of the toolbox and user-manual, including extensive background information.
- http://www.dutchroll.com/

Public Domain Aerospace Software
- Software for the Aerospace Engineer. Site has free sample downloads. CD for sale containing many useful programs, including Digital DATCOM.
- http://www.pdas.com

Zona Technology
- Advanced aeroelastic, aeroservoelastic, flutter and flight loads software products.
- http://www.zonatech.com

Hanley Innovations
- Aerodynamics and Airfoil Analysis Software for Windows. Test airfoils, eBooks about aerodynamics, plot airfoil sections for airplane constructions.
- http://www.hanleyinnovations.com/