Bootstrap Money - How much money can you make selling software?
Numi App - Numi is a beautiful text calculator for Mac.
Omni Calculator - Helping you make rational decisions, one calculation at a time.
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 .
Financial Toolbelt - Powerful calculators that help you improve your finances
Qalculate! - Qalculate! is a multiplatform multi-purpose desktop calculator.