MAT

MAT is a free, open-source app that allows you to solve:

Second Grade Equations

Determinants

Systems of Equations

Roots of Polinomials

Statistics

Triangles

And is available in English, Spanish and Catalan.

MAT source code:

https://github.com/TomasOrtega/MAT

GNU GPL-2 license:

http://gnu.org/licenses/old-licenses/gpl-2.0.html

MAT author: Tomàs Ortega