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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.

Airplane design, analysis & drafting Software. Also offers consultancy and testing services. List of references and clients. FAQ and evaluation programs.

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.

Open Source flight simulator. Source code is available here, and it can run on Windows, Linux, Mac platforms.

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 framework for use in research or academic environments.

Aerodynamics and Airfoil Analysis Software for Windows. Test airfoils, eBooks about aerodynamics, plot airfoil sections for airplane constructions.

Supplies software tools and training for the space, intelligence and military communities.

A free, open source, multi-platform flight dynamics model written in C++. New aircraft models do not require additional code.

Software for the Aerospace Engineer. Site has free sample downloads. CD for sale containing many useful programs, including Digital DATCOM.

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 capabilities