Sage is a free, open-source mathematics software system licensed under the GPL. It combines the power of numerous existing open-source packages into a common Python-based interface. It’s mission is to create a “viable free open source alternative to Magma, Maple, Mathematica and Matlab”. Sage has tools for a broad range of mathematical areas like Linear Algebra, Calculus, Symbolic Math, Plotting, Rings & Groups, Graph Theory, Number Theory and Cryptography. Essentially, “it can do anything from mapping a 12-dimensional object to calculating rainfall patterns under global warming” – as Science Daily puts it . Eager to get started? Start here. Apart from being feature rich, it’s usability is one of it’s greatest strengths. Sage Notebook, a web-interface for all the math you’ll ever want to do, is really the killer feature! As the Sage Marketing page says, “The SAGE GUI surely works on your computer box, because it just runs in Firefox!”. Try it Now!