When you teach mathematics at secondary schools, you enjoy using interactive geometry software with your students. Dr.Geo is one such free software, it comes with some unique features. With such software, students learn geometry the way it should be learned -- by drawing, but Dr. Geo goes one step further.

Maths is a famously lonely discipline - I should know, having spent three years of my life grappling with a single equation (the equation won). Mathematicians meet, and collaborate, it's true; but what would a truly open source approach to the process of solving mathematical problems look like? Maybe something like this...

A former assistant professor from Harvard, now at UofW, Dr. William Stein, and several students, have created a new open-source complex math solving tool called Sage. It is an Internet-based graphical tool which allows the user to do basically anything mathematically, from "mapping a 12-dimensional object to calculating rainfall patterns under global warming."

GeoGebra, a GPL-licensed teaching and learning tool that integrates geometry, algebra, and calculus, benefits both teachers and students alike. Developed by Markus Hohenwarter at Florida Atlantic University, GeoGebra constructs geometrical figures and demonstrates the relationship between geometry and algebra.