| Title | Summary | |
| Article Finder (Search through 20 million citations and 10 million abstracts from over 30,000 journals)(Partly Free) | SummaryPage |
| Google | SummaryPage |
| Scirus: a search engine dedicated to science | SummaryPage |
| TheScientificWorld (sciBASE) | SummaryPage |
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| AltaVista | SummaryPage |
| BIOME | SummaryPage |
| ChemDB Portal, a chemistry search engine for Deep Web | SummaryPage |
| Chemical and Allied Industry Search Engine | SummaryPage |
| Chemie.de (Chemistry search engine) | SummaryPage |
| eMolucules (formerly Chmoogle) | SummaryPage |
| Google Scholar | SummaryPage |
| HotBot | SummaryPage |
| Infoseek | SummaryPage |
| LabHoo | SummaryPage |
| Mooter, a search engine that cluster pages | SummaryPage |
| Northern Light | SummaryPage |
| OneLook Dictionary Search(Free) | SummaryPage |
| ResearchIndex (CiteSeer) | SummaryPage |
| Search chemsoc World Wide Web of Chemistry | SummaryPage |
| Searching Chemical Products at ChemIndex(Free) | SummaryPage |
| Teoma | SummaryPage |
| WiseNut | SummaryPage |
| WorldWideScience.org | SummaryPage |
|
| Excite | SummaryPage |
| FAST Search (ALl the Web) | SummaryPage |
| Google Patent Search | SummaryPage |
| ixquick, a meta search engine | SummaryPage |
| Meta Search of chemical databases: ChemSpy.com | SummaryPage |
| Nanospot: a targeted search engine for nanotechnology | SummaryPage |
| SciSeek | SummaryPage |
| Search articles posted in newsgroups from Deja News | SummaryPage |
| Xooda - a meta search engine | SummaryPage |
| Yahoo! | SummaryPage |
|
| Abcam Ltd.: Antibodies & Reagents, find any antibody | SummaryPage |
| Asico: The Asia Search Engine | SummaryPage |
| Baidu (www.baidu.com) | SummaryPage |
| BioPortfolio's BioWeb Search Engine | SummaryPage |
| ChemClub.Com | SummaryPage |
| ChemSpider(Free) | SummaryPage |
| CliniWeb International | SummaryPage |
| Dogpile | SummaryPage |
| Essential Resource for Immunology(Free) | SummaryPage |
| FTP Search | SummaryPage |
| GlobalSpec - the Engineering Search Engine | SummaryPage |
| HealthAtoZ(Free) | SummaryPage |
| LifeSciencesWorld (formerly BiotechFind) | SummaryPage |
| Lycos | SummaryPage |
| MDchoice | SummaryPage |
| Med Help International (MedHelp) | SummaryPage |
| Medical Matrix(Free) | SummaryPage |
| Medical world Search(Free) | SummaryPage |
| Metacrawler: Multi-search eingines searching | SummaryPage |
| Open Text | SummaryPage |
| Polymer Search on the Internet(PSI) | SummaryPage |
| Scansite: Protein substrate site search and prediction tool(Free) | SummaryPage |
| Search CNET Shareware | SummaryPage |
| WebCrawler | SummaryPage |
| World Wide Composites Search Engine (The largest database of composite industry related web sites on the internet) | SummaryPage |
|
| ChemGuide, FIZ Chemie | SummaryPage |
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