| CSD | Cambridge Structural Database |
| Characteristic Properties of Transition Elements |
| ChemIDplus - Searchable database of 350,000 chemical records, including over 100,000 structures |
| ChemSpider - free chemical structure database |
| Chemical Structure Drawing Software |
| COD | Crystallography Open Database |
| ChEMBL | Database of bioactive drug-like small molecules |
| ZINC | Database of commercially-available compounds for virtual screening |
| Mineral structure databases |
| Molecular Models of small organic molecules |
| PubChem BioAssay Database |
| PubChem Compound Database:
Non-redundant set of validated chemical structures |
| Symmetry Resources at Otterbein University |
| chemicalize.org - ChemAxon's Name to Structure parsing to identify chemical structures on webpages |
