The Geometer's Sketchpad!

GeoGebra is free and multi-platform dynamic mathematics software for learning and teaching. It has received several educational software awards in Europe and the USA.

Gnuplot is a portable command-line driven interactive data and function plotting utility. It was originally intended as to allow scientists and students to visualize mathematical functions and data. It does this job pretty well, but has grown to support many non-interactive uses, including web scripting and integration as a plotting engine for third-party applications like Octave. Gnuplot supports many types of plots in either 2D and 3D. It can draw using lines, points, boxes, contours, vector fields, surfaces, and various associated text. It also supports various specialized plot types. »

Geometry Pad is a dynamic geometry application for iPad and Android tablets. Geometry Pad is your personal assistant in teaching and learning geometry through practice.

Lybniz is a simple and very easy to use mathematical function graph plotter written in Python and GTK. Expressions are entered in Python syntax.

Is a powerful, easy-to-use, equation plotter with numerical and calculus features:

Dynamic geometry software for iPhone

Autograph is a dynamic PC program operating in 3 modes: