Subject guides: Mathematics: Subject websites

Electronic texts

AMS Books Online. A collection of free-to-use AMS published works.
Cornell University Library: Historical Mathematics Monographs. Presents the scanned texts of about 500 historical works.
Directory of Mathematics Preprint and e-Print Servers. From the AMS web pages.
Electronic Library of Mathematics. Offered by the European Mathematical Society (EMS), this site offers links to more than 50 free full-text scholarly mathematics journals, plus some other works.
Lecture Notes In Mathematics. This prestigious series of works, published by Springer, is now available in electronic form. Only available to staff and students of the University of Manchester.
Mathematical Books. A section within Mathematics on the Web listing freely available e-books.
Mathematical Sciences Research Institute (MSRI) Publications. A series published by Cambridge University Press since 1995, freely available.
Mathematics e-Print archive.
Göttinger Digitalisierungszentrums. The Gottingen Digitization Center provides some 400 mathematics books mainly in German or Latin, and mainly from the 19th or early 20th century, plus 38 journals.
Statsoft Electronic Textbook. "Offers training in the understanding and application of statistics".
University of Michigan Historical Mathematics Collection. A growing collection of mathematics books published in the 19th or early 20th centuries.

British Society for the History of Mathematics.
Fields Medal. Awarded every four years, this is the mathematical equivalent of a Nobel Prize.
History of Mathematics. A set of links maintained by David Wilkins of Trinity College Dublin.
International Commission for the History of Mathematics .
MacTutor History of Mathematics archive.
Mathematics Genealogy Project. This site's goal is 'to list all individuals who have received a doctorate in mathematics'.

Guide to Available Mathematical Software (GAMS). A cross-index and virtual repository of mathematical and statistical software components of use in computational science and engineering maintained by NIST.
Wolfram Library Archive. Information on Mathematica and its applications from Wolfram Research.
Mathematics WWW Virtual Library: Software.
Netlib. A repository containing freely available software, documents, and databases of interest to the numerical, scientific computing, and other communities.

Catalogue of Lattices. A database of more than 150,000 lattices.
On-Line Encyclopedia of Integer Sequences . At last count, over 130,000 sequences.
World Combinatorics Exchange Databases, links, Electronic Journal of Combinatorics.

MathArchives . From the University of Tennessee.
Mathematical Quotations Server. From Furman University.
Mathematics on the Web. Very useful service from the American Mathematical Society.
Mathematics WWW Virtual Library. Hosted by Florida State University
MathGuide. A German site (in English).
Math-Net Links.
MathWorld. Formerly Eric Wiesstein's World of Mathematics, it claims to be the "web's most extensive mathematics resource".