GNU Octave - GNU Octave is a programming language for scientific computing.

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

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

Xcos - Xcos is a graphical editor to design hybrid dynamical systems models.

Maple - Considered the leading mathematical software, Maple intertwines the world’s most advanced math engine with a user-friendly interface.

QtOctave - QtOctave: a front-end for Octave/un Front-End para Octave