Mobile App Revenue Calculator - Estimate your app revenue from ads and in-app purchases
Numi App - Numi is a beautiful text calculator for Mac.
Startup Return Calculator - How much money can your startup investment make you?
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.
Hourly Rate Calculator - Find out your ideal hourly rate
Soulver 3 for Mac - A smart notepad with a built in calculator