Giac

Giac Is A Computer algebra system, which can be downloaded from

    http://www-fourier.ujf-grenoble.fr/~parisse/english.html
Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.1 or any later version published by the Free Software Foundation; with no Invariant Sections, with no Front-Cover Texts, and with no Back-Cover Texts. A copy of the license is included in the section entitled "GNU Free Documentation License".