ChemDraw - ChemDraw - The Gold Standard for Chemical Structure Drawing and Research Publications.
ImageJ - and Other Health Care
Avogadro - Avogadro is a free, fantastically easy to use molecule editor.
MediaLab Document Control - Other Laboratory
ChemDoodle - Chemical drawing and publishing software for desktop, web and mobile. Affordable and used by thousands of scientists around the world. Free trial available for immediate download.
OpenCFU - A powerful, user-friendly and free software to count and characterise bacterial (and other cell) colonies forming units from pictures.