MATLAB - A high-level language and interactive environment for numerical computation, visualization, and programming
Pspice - OrCAD PSpice technology provides the best, high-performance circuit simulation to analyze and refine your circuits, components, and parameters before committing to layout and fabrication
GNU Octave - GNU Octave is a programming language for scientific computing.
Solve Elec - Solve Elec is a free educational program to draw and analyze electrical circuits.
Wolfram Mathematica - Mathematica has characterized the cutting edge in specialized processing—and gave the chief calculation environment to a large number of pioneers, instructors, understudies, and others around the globe.
PCBWeb - PCBWeb is a 100% free Windows desktop CAD application for designing and manufacturing electronics...