Academic Info
The Chemistry Gateway includes links to general chemistry, organic chemistry, chemistry education, chemistry databases & chemistry publications. The site also contains links to a reference shelf, chemistry libraries, and other areas of science.
http://www.academicinfo.net/chem.html

Biochemistry for Schools
biochem4schools - is a new online resource developed by The Biochemical Society for use by teachers and students at all levels who are searching for biochemistry resources. It currently provides a gateway to over 160 web-based resources categorized into 16 wide-ranging topic areas.
http://www.biochem4schools.org/

Chemdex
The catalogue includes links to academic departments, commercial sites and sites of general chemistry interest in over 20 areas, broken down by geographical location and by subject area. The collection also includes pointers to software, newsgroups and conference proceedings.
http://www.chemdex.org/

Chemical Suppliers Directory
The directory of companies providing HTS equipment, heterocyclic building blocks, compound libraries, custom peptide synthesis, fine chemicals, natural compounds custom synthesis and services that support drug discovery in the pharmaceutical industry.
http://www.rdchemicals.com

ChemInfo
ChemInfo, Chemical Information Sources, is designed to help people find and learn how to use chemical information resources on the Internet and elsewhere. It provides two resource guides: SIRCh (Selected Internet Resources for Chemistry) and CCIIM (Clearinghouse for Chemical Information Instructional materials). Databases compiled or maintained at Indiana University, Bloomington, and other free databases on the web can be searched.
http://www.indiana.edu/~cheminfo/

Chemistry Webercises Directory
The Chemistry Webercises Directory is designed as a directory for a limited number of educational resources on the Internet in the context of chemistry related topics. It covers properties of substances; general chemistry; applied chemistry; history of chemistry; organic chemistry; chemistry topics of concern to society; other directories and search engines; teaching resources, etc.
http://www.wiley.com/college/webercises/

Links for Chemists
Links for Chemists is an index of over 8,400 chemistry resources on the web. This site is the copyright of The University of Liverpool, Department of Chemistry.
http://www.liv.ac.uk/Chemistry/Links/links.html

Open Directory - Science: Chemistry
The Open Directory Project's goal is to produce the most comprehensive directory of the web, by relying on a vast army of volunteer editors. Links to several hundred chemistry related sites.
http://www.dmoz.org/Science/Chemistry/

Rolf Claessen's Chemistry Index
The WWW portal for all chemists with thousands of links to free and for a fee software, companies, free databases, online journals, societies, job resources, spectroscopy resources, reaction mechanisms and much more.
http://www.claessen.net/chemistry/

The Analytical Chemistry Springboard
This is an attempt to present a comprehensive list of analytical chemistry resources on the Internet. The methods covered include: chromatography, electrochemistry, electron spectroscopy, chemometrics, elemental analysis, electrophoresis, mass spectrometry, nuclear magnetic resonance, optical molecular spectroscopy, radiochemistry, surface analysis, X-ray spectroscopy, and thermal analysis.
http://www.anachem.umu.se/jumpstation.htm

The Virtual Chemistry Center
Lots of links to material from every branch of chemistry, broken into several categories: Measurement, Periodic Tables, Chemicals and Biochemicals, Chemistry Overview, and Chemistry Courses, Textbooks, and etc
http://www.martindalecenter.com/GradChemistry.html

Yahoo! Chemistry Directory
Yahoo!'s attempt at organizing Internet chemistry resources. Find answers to all types of chemistry information by visiting the sites listed in Yahoo's directory.
http://dir.yahoo.com/Science/Chemistry/