Note: This section contains only the relatively large collections of molecular structures I have encountered on the WWW. Smaller groups, such as those related to tutorials on VSEPR and the like, are listed on Topics pages appropriate to the subject matter.

Molecules listed by central atom, formula and/or name  Chime

This is an extensive collection which includes organic, inorganic and coordination compounds. Created by W.F. Coleman of Wellesley College.

3-D Virtual Chemistry Library--Molecular Database Project  Chime

From Imperial College. Some background information is given on each substance as well as the structure in several formats.

Molecular database without transition metals  Chime

Chime-enabled examples of all the categories in VSEPR. From Gérard Dupuis, Lycée Faidherbe de Lille, France.

Woodcock's Molecular Models  Chime

Searchable, organic database. Structures are in .pdb format, readable by Chime. From David Woodcock at Okanagan University College, Kelowna, British Columbia .

Visualizing molecules  Chime

Some introductory molecular geometry and a variety of small molecules and organic structures. From Scott Van Bramer at Widener University.

WWU Virtual Molecular Model Kit  Chime

A long, long list of various organic structures from the simple to the stereochemically complex. From Donald L. Pavia, Western Washington University.

The Molecular Library  Chime

Over 400 models from Harry Ungar at Cabrillo College.

Inorganic Chemistry Teaching Resources  Chime

Scot Wherland's site contains a 3-D periodic table of ionic radii as well as a structure library including quite a few coordination complexes. Washington State University.

Crystal Lattice structures  Chime, Jmol

From the Naval Research Laboratory.

VMRL File Creator for Chemical Structures

If you like this sort of thing, you can create a VMRL file (and save it locally) from a Smiles string or even from a local MOL or PDB (or other supported) file. Supports many options for display.