Avogadro - Avogadro is a free, fantastically easy to use molecule editor.
ImageJ - and Other Health Care
ACD/ChemSketch - ACD/ChemSketch for personal and academic use brings the power of our structure drawing package to your home computer.
Gnome Chemistry Utils - The Gnome Chemistry Utils include six chemistry related programs:
TrueChem - TrueChem is software designed specifically to control and automate the management of chemistries, coatings, and wet processes.
XDrawChem - XDrawChem is a free software program for drawing chemical structural formulas, available for Unix...