Free42 - Free42, an HP-42S calculator simulator
GeoGebra Scientific Calculator - Free online scientific calculator from GeoGebra: perform calculations with fractions, statistics and exponential functions, logarithms, trigonometry and much more!
Calculator OSX App - Real Time.
Qalculate! - Qalculate! is a multiplatform multi-purpose desktop calculator.
RealCalc Scientific Calculator - RealCalc Scientific Calculator
SpeedCrunch - SpeedCrunch. SpeedCrunch is a high-precision scientific calculator featuring a fast, keyboard-driven user interface. It is free and open-source software, licensed under the GPL. Download Documentation Donate .