SAGE 3.0.3 - Open source advanced mathematics software. (Free): "

SAGE: Open Source Mathematics Software... Creating a viable free open source alternative to Magma, Maple, Mathematica, and Matlab.
General and Advanced Pure and Applied Mathematics 
 Use SAGE for studying a huge range of mathematics, including algebra, calculus, elementary to very advanced number theory, cryptography, numerical computation, commutative algebra, group theory, combinatorics, graph theory, and exact linear algebra.	
Use an Open Source Alternative
 By using SAGE you help to support a viable open source alternative to Magma, Maple, Mathematica, and MATLAB. SAGE includes many high-quality open source math packages.
Use Most Mathematics Software from Within SAGE 
 SAGE makes it easy for you to use most mathematics software together. SAGE includes interfaces to Magma, Maple, Mathematica, MATLAB, and MuPAD, and the free programs Axiom, GAP, GP/PARI, Macaulay2, Maxima, Octave, and Singular.	
Use a Standard Programming Language 
 You work with SAGE using the highly regarded scripting language Python instead of an obscure language designed for a particular mathematics program. You can write programs that combine serious mathematics with anything else.
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