Article Sciences - Scientific article search and order engine, a service provided by Institut de l'Information Scientifique et Technique (INIST) of Centre National de la Recherche Scientifique (CNRS), France.
CiteSeer - Search engine for computer science and related matters. For all results number of citations are given which allows to estimate the importance of a paper in a given context. Most of the papers are cached and available for direct download as postscript or PDF.
ISI Highly Cited - A search tool to identify individuals, departments and laboratories that have made fundamental contributions to the advancement of science and technology in recent decades.
iSpecies - A species search engine from Rod Page of Glasgow University. Search on either the common or Latin name of a species. Results are generated by querying other data sources.
Bibliographies on Mathematics - Search enabled database of citations for a large selection of mathematical specialties. Authors may add bibliographic lists or contextual references to their work.
Citebase Search - Experimental demonstration of the Open Citation Project. Search citations by paper or author.
CiteSeer.ist - E-print database of mathematics and science papers with citation information. Papers may be added by specifying the URL where their files reside.
E-print Network - U.S. Department of Energy's search interface. Many options for fine tuning a search.
Front for the LANL ArXiv - Easiest search access to papers posted on the preeminent Los Alamos National Lab (LANL) Physics and Mathematics preprint server (arXiv).
Hypertext Bibliography Project - Search enabled database of citations for a large selection of computer science specialties. Authors may add bibliographic lists or contextual references to their work.
MathNet/MPRESS - Mathematics preprint search engine. Includes some European servers not covered elsewhere.
MathSearch - Searches a collection of mathematical and statistical preprint servers and databases.
Project Euclid - Full text access to the journal Annals of Mathematics; a limited number of other journals available through paid subscriptions to Project Euclid.
SAIL-eprints - E-Print search engine. Includes some archives not indexed by other engines (see the "Data Providers" pull-down menu). Use as a guest or register and receive free targeted alerts and other personalized features.
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