Explain it with Molecules
- Uses interactive applets of molecules to answer basic science questions like why ice floats, how soap works, and why diamonds are so hard.
- http://www.worldofmolecules.com/interactive_molecules/

Common Molecules Collection
- Discover more information about general molecules common in everyday life, including water molecules, minerals, and vitamins.
- http://www.reciprocalnet.org/edumodules/commonmolecules/index.html

Quia - Binary Ionic Compounds
- Interactive games to name and write formulas for binary ionic compounds.
- http://www.quia.com/custom/3996main.html

ACS Molecule of the Week
- American Chemical Society resource offering a new molecule every week, along with an image and description. An archive and periodic table is also available.
- http://chemistry.org

Marvelous Molecules
- Includes a brief introduction about what molecules are, along with some pictures of certain molecules including aspirin and carbon dioxide.
- http://www.nyhallsci.org/marvelousmolecules/

Visualizing Molecules
- Provides an introduction to what molecules are by focusing on examples that include binary compounds and molecular geometry.
- http://science.widener.edu/svb/molecule/molecule.html