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 .
CalcTastic Scientific Calculator - Scientific Calculator with Fractions, Complex Numbers and RPN Support
Qalculate! - Qalculate! is a multiplatform multi-purpose desktop calculator.
PCalc - PCalc is the powerful choice for scientists, engineers, students, programmers, or indeed anybody...
Numi App - Numi is a beautiful text calculator for Mac.