Horos - A free, open source 64-bit DICOM medical image viewer
ChemDraw - ChemDraw - The Gold Standard for Chemical Structure Drawing and Research Publications.
MicroDicom - DICOM viewer. MicroDicom is a free DICOM viewer. Export to the most common picture formats, movie, clipboard. It is equipped with most common tools for manipulation of DICOM images.
Avogadro - Avogadro is a free, fantastically easy to use molecule editor.
3D Slicer - Slicer is a community platform created for the purpose of subject specific image analysis and...
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.