Scilab is a free and open source software for numerical computation developed by Scilab Enterprises, France. Scilab also includes Xcos which is an open source alternative to Simulink.
Scilab
Python is a general-purpose, high-level, remarkably powerful dynamic programming language that is used in a wide variety of application domains. It supports multiple programming paradigms.
Python
FreeEDA (formerly known as Oscad) is an EDA tool for circuit design, simulation, analysis and PCB design. It is developed by the FOSSEE team at IIT Bombay as an open source alternative to OrCAD.
FreeEDA
OpenFOAM is a free and open source CFD toolbox useful to solve anything from complex fluid flows involving chemical reactions, turbulence and heat transfer, to solid dynamics and electromagnetics.
OpenFOAM
Optimisation and Simulation are the areas of focus in the FOSSEE OR Tools project. The OR Tools include COIN-OR, GLPK etc, interfaced through open-source environments like Scilab and languages such as Python.
OR-Tools
Osdag is a free and open-source software which allows the user to design steel structures using a graphical user interface. The GUI also provides 3D visualization of the designed component and images. Osdag