Icy - Icy is an open community platform for bioimage informatics
ChemDraw - ChemDraw - The Gold Standard for Chemical Structure Drawing and Research Publications.
ImageJ - and Other Health Care
Fiji - Fiji: A batteries-included distribution of ImageJ.
Gnome Chemistry Utils - The Gnome Chemistry Utils include six chemistry related programs:
OpenCFU - A powerful, user-friendly and free software to count and characterise bacterial (and other cell) colonies forming units from pictures.