Numi App - Numi is a beautiful text calculator for Mac.
Avogadro - Avogadro is a free, fantastically easy to use molecule editor.
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 .
ImageJ - and Other Health Care
Qalculate! - Qalculate! is a multiplatform multi-purpose desktop calculator.
ACD/ChemSketch - ACD/ChemSketch for personal and academic use brings the power of our structure drawing package to your home computer.