MolView

Open Source online service

BKchem

BKChem is a free (as in free software :o) chemical drawing program.

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.

ChemDraw

ChemDraw - The Gold Standard for Chemical Structure Drawing and Research Publications.

ChemJuice Grande

What’s your favorite molecule?

Chemik

Cool Chemistry Tool - educational app for Students.

JChemPaint

JChemPaint is an editor and viewer for chemical structures in 2D.