Omni Calculator - Helping you make rational decisions, one calculation at a time.
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.
Percentage Calculator - The percentage calculator to make your life easier
Soulver 3 for Mac - A smart notepad with a built in calculator
Financial Toolbelt - Powerful calculators that help you improve your finances
Numi App - Numi is a beautiful text calculator for Mac.