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.
RT-LAB - OPAL-RT’s mission is to provide cutting-edge real-time simulation technology to engineers and researchers around the world.
RawTherapee - RawTherapee is a free RAW converter and digital photo processing software.
MATLAB - A high-level language and interactive environment for numerical computation, visualization, and programming
SIMUL8 - Simulation is an effective system that permits you to make striking, certain choices since it gives you the confirmation to make certain you are settling on the right decision.
Maxima - Maxima is a fairly complete computer algebra system written in Lisp with an emphasis on symbolic computation.