Blender - Blender is the open source, cross platform suite of tools for 3D creation.
ChemDraw - ChemDraw - The Gold Standard for Chemical Structure Drawing and Research Publications.
SelfCAD - SelfCAD is an online 3D modeling and slicing software.
ACD/ChemSketch - ACD/ChemSketch for personal and academic use brings the power of our structure drawing package to your home computer.
SketchUp - 3D for Everyone
Gnome Chemistry Utils - The Gnome Chemistry Utils include six chemistry related programs: