About.com: Chemistry
News articles, periodic tables, educational resources, newsletters, and annotated links.
http://chemistry.about.com/

Chemical Forums
Discussion boards for all areas of chemistry, at levels ranging from high school to graduate school and practicing chemists. Site also includes web directory, periodic table, articles, and reference tables.
http://www.chemicalforums.com/

Chemical Information Sources
Resource designed to help people find and learn how to use chemical information on the Internet and elsewhere. Wiki interface and llnks.
https://en.wikibooks.org/wiki/Chemical_Information_Sources

Molecule of the Day
Weblog explains the relationship between chemistry and real life to non-chemists.
http://scienceblogs.com/moleculeoftheday/