Qalculate! - Qalculate! is a multiplatform multi-purpose desktop 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 .
SpeQ Mathematics - SpeQ is a small, extensive mathematics program with a simple, intuitive interface.
Calculator by Xlythe - Calculator is a simple 4 function calculator.
NumWorks - The graphing calculator that makes learning math easier.
HEXelon MAX - HEXelon MAX is a science calculator. It solves math expressions like: Sin(Pi)-Root(-8;3)+3.