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 .
Numbr - An elegant calculator for the web
Qalculate! - Qalculate! is a multiplatform multi-purpose desktop calculator.
Pry Financials - Finance for Founders