PCalc - PCalc is the powerful choice for scientists, engineers, students, programmers, or indeed anybody...

HEXelon MAX - HEXelon MAX is a science calculator. It solves math expressions like: Sin(Pi)-Root(-8;3)+3.

Calculator by Xlythe - Calculator is a simple 4 function calculator.

eCalc Scientific Calculator - An easy to use scientific calculator with many advanced features to help you solve algebra...

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.

Gnome calculator - Calculator for the GNOME Desktop Environment, formerly known as gcalc (and gcalctool CLI).