rayshade and POV for Mathematica Export + view
generates nice period table from given data
more calendar conversions, epochs, JDN, moon, +
geocentric <> geodetic <> XYZ basic equations
Taylor series Integrator for Differential Equations
Truncated power series algebra
It explains a phenomenon of a coin tossing game called Penney Ante
Circadian behaviral assay software for Arduino 1.0