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 .

Kalk Calculator - Powerful calculator application for Linux mobile and desktop devices

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

NumWorks - The graphing calculator that makes learning math easier.

Soulver - Soulver is a software application that functions as a calculator that allows you type a continuous stream of information rather than having to input data into multiple cells.

Calculairum - Descriptive, Editable, Gesture-Based & Voice Controlled Calculator