Base Peak: Formerly "Mass Spectrometry on the Internet", an index page of mass spectrometry internet sites including links to mass spectrometry groups, companies, resources, and software.
ChemDex: A directory of chemistry resources on the WWW, located on the Sheffield chemistry server.
ChemFinder Searching: An index to chemical information on the Internet, with structures and physical properties, searchable by name, structure, CAS Number, and physical properties.
Chemical Directories, Indicies and Links Sites: A meta-listing of chemistry indicies - a subsection of Links for Chemists.
Chemical Resources: Many places to search chemical information in Internet, page held in Columbia.
Chemie.DE: Chemie.DE is an information service for the german chemistry community. It provides search engines for chemistry and various databases for chemical information.
ChemIndustry.com: Providing information on all facets of the world-wide chemical industry. Many links to web resources of interest to chemists and the chemical industry.
Chemistry Collection of Infostead Australia: A comprehensive Australian directory of links for all those with an interest in chemistry.
Chemsoc: Online networks in specialist areas, science, industry and product news, a comprehensive events database, job centre, access to major references, and society resources.
ChemWeb.com: Features searchable chemistry journals and databases, jobs, books, software, conferences diary and ChemDex+.
ChIN - The Chemical Information Network: Comprehensive directory of chemical information on the web.
Information Retrieval in Chemistry Server: A compendium of chemistry resources by field and by topic.
Links for Chemists: An extensive index of chemistry resources maintained at The University of Liverpool.
Medicinal Chemistry Links: A collection of links for chemists and students involved in organic, biochemical, computational, and/or medicinal chemistry research, maintained by Virginia Commonwealth University.
moreChemistry: Maintains lists of events, links and jobs. Registered members can promote their websites themselves.
Rolf Claessen's Chemistry Index: Links to freeware, discounted software, free databases, societies, spectroscopy resources, reaction mechanisms and online discussion forums.
The Wired Chemist: A collection of Chemistry resources, including links to other sites and data tables.
Top20Chemistry.com: Online directory for chemistry education in organic, analytical, bio, physical, electro, atmospheric, and several other topics.