Maxima, a Computer Algebra System
Maxima is a fairly complete computer algebra system written in Lisp with an emphasis on symbolic computation. It is based on DOE-MACSYMA and licensed under the GPL free software license. Its abilities include symbolic integration, 3D plotting and solving differential equations.
William Schelter Massachusetts Institute Of Technology Massachusetts Institute Public License Computer Algebra Symbolic Computation
Source: maxima.sourceforge.io