Distantias - "Calculate driving distances between two points, calculate fuel costs, flight distances from airport to airport, distances in a straight line cycle trip distances, travel and public transport distance and journey times between two points and more."
Good Calculators - "This website provides a variety of online calculators, some math, engineering and conversion calculators."
How Far Is It? - - distances between 500 cities worldwide plus very basic information about each location
Measurements Converter - friendly JavaScript interface converts length, weight, area, speed, temperature and more, into different units and unit systems.
Online Unit Conversion - "International Unit Conversion Calculator - Free unit conversion calculator for easy measurement conversion. International Unit Converter allows metric measurement conversions in many categories."
Royal Society of Chemistry: Visual Elements Periodic Table - "The Royal Society of Chemistry’s interactive periodic table which includes Murray Robertson’s Visual Elements artwork. Hover over the elements to see key facts and the supply risk which highlights elements where limited abundance may hinder the production of new technologies. Click the elements for interesting facts, atomic data, isotopes and more."
TI 84 Online Calculator - Do you need a quick way to perform calculations, graph functions, or solve math problems without carrying a physical TI-84?
United States Naval Observatory - The United States Naval Observatory (USNO) provides a wide range of astronomical data and products, and serves as the official source of time for the U.S. Department of Defense and a standard of time for the entire United States.
U.S. Metric Association (USMA) - national non-profit organization, founded in 1916, which advocates U.S. conversion to the International System of Units (SI), also called the modern metric system.
