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Calculators On-Line Center Over 22,000 on-line calculators for every conceivable subject–from calculating dinosaur running speeds to the effects of nuclear explosions to bra sizes to seeing sunrise/moonrise times for any spot on earth to Calendar conversion calculators for nearly every ancient culture.
D'Hondt System Elections Calculator - Election calculus simulator based on the modified d'Hondt system.
NOAA ESRL Climate and weather data and maps including NCEP reanalysis (covering 1948-2009). Also has a handy (if limited) data mapping tool.