GeoGebra is a dynamic match teaching & learning software from Austria that always wins the international education software awards. It combines the graphing calculator for functions, geometry, algebra, calculus, statistics, 3D math, etc.

Compared with the powerful SpeQ, Graph is more concentrated. Specially deal with the graph of a function, it covers all features for the evaluation of functions from Elementary Mathematics to Higher Mathematics, as a open-source, free and full-featured function drawing application, as well as a small size, Graph is a recommendable mathematical tool.