Molecular models are of great importance in organic chemistry, helping to predict properties and reactivity of organic compounds.
Here you will find models of organic compounds (balls, rods, surfaces), visualized using jmol , an interactive application programmed in java.

See molecular models 

JSmol is a free and open source molecule viewer for students, teachers, and researchers in chemistry and biochemistry. It is cross-platform, compatible with Windows, Mac OS X and Linux/Unix systems.