PCalc - PCalc is the powerful choice for scientists, engineers, students, programmers, or indeed anybody...
SpeQ Mathematics - SpeQ is a small, extensive mathematics program with a simple, intuitive interface.
OpalCalc - OpalCalc is a brand new type of calculator for the PC.
Qalculate! - Qalculate! is a multiplatform multi-purpose desktop calculator.
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.
NumWorks - The graphing calculator that makes learning math easier.