Numi App - Numi is a beautiful text calculator for Mac.
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.
ConvertAll - A comprehensive unit conversion program.
Calculator++ - Calculator++ is an advanced, modern and easy to use scientific calculator.
Parsify Desktop - Extendable calculator for the 21st century ⚡
XE.com - XE.com Inc. (XE) is a Canadian online foreign exchange services company.