General Chemistry Online - An introductory, searchable guide to chemistry that includes hyperlinked notes and guides for first semester chemistry, as well as articles. There is also a searchable glossary of over 900 terms, over 400 FAQs and a trivia quiz.
Chem4Kids - Easy to navigate with site map or search engine and includes drop-down glossary for terms. Also includes data on atoms, elements and matter as well as biographies of famous chemists.
Chemistry - the environment, biochemistry, and inorganic, organic, and medicinal chemistry.
Chemistry: MIT Open Courseware
HippoCampus Chemistry Resources
Chemistry Homework Help
Get help for your chemistry homework! You'll find a variety of resources, from ask-an-expert, online converters and calculators, study guides, dictionaries, a review of math/science fundamentals, and examples of worked problems.