GNU Maxima is a free
computer algebra system, written in
Lisp and released under the
GNU General Public License. It is based on an early version of
Macsyma[?], and was maintained by
Bill Schelter from
1982 until his death in
2001. It is now maintained by a group of volunteers at
Sourceforge.
The GNU TeXmacs mathematical editor program can be used to provide an interactive graphical user interface for Maxima.