"gtdev" is an open source tool which assists the engineer in developing a new gas turbine (1D Thermo- and Aerodynamics). It is created by the student research group "Hummingbird - TUM Gas Turbines" placed at the LFA, TU Munich: http://www.hummingbird.tum.de
LibreEngineering - suite of instrumentation, electrical, mechanical, process engineering calculation and design programs and other tools. Licensed under GPL3. Written in Python with Qt toolkit.