Ruvenss Calculator - Simple yet very effective calculator with print capabilities and log registration.
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 .
PCalc - PCalc is the powerful choice for scientists, engineers, students, programmers, or indeed anybody...
Precise Calculator - Free programmable scientific calculator for Windows; solve math problems, algebra, statistics examples and tutorial
OpalCalc - OpalCalc is a brand new type of calculator for the PC.
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.