Wikipedia:WikiProject Chemicals/Data is a collection of links and references that are useful for chemistry-related works. This includes free online chemical databases, publications, patents, computer programs, and various tools.
Science is Fun
University of Wisconsin–Madison Chemistry Professor Bassam Z. Shakhashiri, shares the fun of science.
A good place to figure out what equals what.
General Chemistry Online
Clear text and comprehensive coverage of general chemistry topics by Fred Senese, Dept. of Chemistry Frostburg State University
General Chemistry Demonstration at Purdue
Video clips (and descriptions) of lecture demonstrations.
Intota Chemistry Experts
A large online listing of real-world chemistry expert biographies provides examples of the many areas of expertise and careers in chemistry.
Chemistry Webercises Directory
A large listing of chemistry resources maintained by Steven Murov, Emeritus Chemistry Professor Modesto Junior College.
MathMol (Mathematics and Molecules) is a good starting point for those interested in the field of molecular modeling.
Educational Resources and Essential References from Wiley, the world's largest chemistry publisher
A directory of free full-text journals in chemistry, biochemistry and related subjects.
The Element Song
A goofy little song about all of the elements.