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.
Sellertour PayPal fee Calculator - PayPal Fee Calculator is a simple and effective free tool that allows you to calculate your PayPal...
Numi App - Numi is a beautiful text calculator for Mac.
WolframAlpha - WolframAlpha brings expert-level knowledge and capabilities to the broadest possible range of people—spanning all professions and education levels.
RealCalc Scientific Calculator - RealCalc Scientific Calculator