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

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

NoteCalc - Browser-based notepad built for math calculations.

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.

CalcTape - CalcTape is a revolutionary new kind of pocket calculator.