Greg Egan

Greg Egan is an Australian science fiction author who's noted for writing stories that employ a hefty mixture of both hard science and philosophy. His home page includes not only the standard bibliography and story links (including my personal favorite, Oceanic) but a number of Java applets, in his applets gallery, that he wrote himself which he uses to visually illustrate various scientific and mathematical concepts.

My personal favorite is a demonstration of light refraction as it passes through a circle of rotating prisms.