RANDOM.ORG - RANDOM.ORG offers true random numbers to anyone on the Internet.
Solve - A colorful calculator - Solve is a calculator like no other!
GeneratorMix - A place with hundreds of generators split into different categories from science to entertainment.
GeoGebra Scientific Calculator - Free online scientific calculator from GeoGebra: perform calculations with fractions, statistics and exponential functions, logarithms, trigonometry and much more!
Random Number Generator - Randomly generate integers or floating point numbers within a given range and specified discrete or continuous statistical probability distribution.
Qalculate! - Qalculate! is a multiplatform multi-purpose desktop calculator.