Strange attractors gallery. You can generate random 'math/abstract art' images or browse those which were already picked by someone as sufficiently 'artistic'. You may regenerate them at arbitrary resolution up to 10Mpix and download for free. Have FUN.
Classic mortgage/loan calculator. You can set loan, interest and duration in years and calculator shows you progress how your loan is going to look over years. You can see exact numbers in table or see overal picture in graph. Make wise decision when making loan.