American Chemical Society

Analytical Chemistry Springboard

BioChemNet

Inscight - Science news presented by Science magazineInternet Chemistry Resources

Jesuits in the Sciences

Learn Chemistry Online - A great way to learn and practice organic chemistry. Excellent multimedia files for orbitals and structures.

Paul's Chemistry Lab - Chemistry links for the grade school through graduate school student. Superb resources for any student in chemistry. 

Web Elements - An excellent periodic table on the Web.

WWW Virtual Library - Includes a nice listing of commercial organizations (if you're looking for a job or an internship!).