handyCalc VS RealCalc Scientific Calculator

Calcbot for Apple Watch - Calculate, convert, and split tips from your wrist

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 .

Qalculate! - Qalculate! is a multiplatform multi-purpose desktop calculator.

Numi App - Numi is a beautiful text calculator for Mac.

SpeQ Mathematics - SpeQ is a small, extensive mathematics program with a simple, intuitive interface.

NumWorks - The graphing calculator that makes learning math easier.