Maths

• http://en.wikipedia.org/wiki/Radix
• http://threesixty360.wordpress.com/2009/06/09/ethiopian-multiplication/ [1]

• http://www.greenteapress.com/thinkbayes/
• http://betterexplained.com/articles/linear-algebra-guide/
• http://blog.stata.com/2011/03/03/understanding-matrices-intuitively-part-1/

• https://normaldeviate.wordpress.com/2012/11/17/what-is-bayesianfrequentist-inference/

• http://www.wisdomandwonder.com/link/6582/some-thoughts-on-mathematics
• http://news.ycombinator.com/item?id=4839881

• https://gist.github.com/4158578

Software

• Mathics is a free, general-purpose online computer algebra system featuring Mathematica-compatible syntax and functions. It is backed by highly extensible Python code, relying on SymPy for most mathematical tasks and, optionally, Sage for more advanced stuff.

Vis

• http://www.datapointed.net/visualizations/math/factorization/animated-diagrams/#

to find those prime vis things again

Tools

• http://oeis.org/