PyCharm - Python & Django IDE with intelligent code completion, on-the-fly error checking, quick-fixes, and much more...

MATLAB - A high-level language and interactive environment for numerical computation, visualization, and programming

Spyder - The Scientific Python Development Environment

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.

Thonny - Python IDE for beginners

Maxima - Maxima is a fairly complete computer algebra system written in Lisp with an emphasis on symbolic computation.