IngentaConnect
A citation database that provides access to research articles in a wide range of fields. Full text of individual articles may be delivered online for a fee or requested via document delivery.

MathSciNet
Full-text access to the following American Mathematical Society publications: Mathematical Reviews (1940-present), Current Mathematical Publications (reviews added daily).

Science Direct
Offers a rich journal collection of over 1,200 titles including over 60 in mathematics. Full text and abstracts.

Society for Industrial and Applied Mathematics (SIAM) Journals
Full-text access to the following journals:

• SIAM Journal on Applied Mathematics
• SIAM Journal on Matrix Analysis and Applications
• SIAM Journal on Numerical Analysis
• SIAM Journal on Optimization
• SIAM Review

Springer LINK Journals
Partial and some full text access starting in the late 1990's to titles in Life Sciences, Engineering, Math, Chemistry, Physics, Computer Science, and Social Sciences.

Cornell University Library: Historical Mathematics Monographs
A collection of selected monographs with expired copyrights chosen from the mathematics field.

EULER: European Libraries and Electronic Resources in Mathematical Sciences
The EULER service provides you with a one-stop-shop in your search for mathematical resources such as books, pre-prints, web pages, abstracts, proceedings, serials, technical reports and theses.

Intute: Mathematics
A comprehensive collection of annotated links on mathematics managed by a network of UK universities and partners.

Math Archives
The University of Tennessee, Knoxville presents mathematics software, preprints, bibliographies, and teaching materials.

Math Forum
The leading online resource for improving math learning, teaching, and communication. Includes a resource library for education levels from elementary to graduate.

MathGuide
An Internet-based subject gateway to scholarly information in mathematics, from the Lower Saxony State- and University Library, Göttingen (Germany).

Math on the Web
A comprehensive guide to wide range of math resources. Maintained by AMS.

Mathematical Resources on the Web
A comprehensive list of resources from the University of Florida.

MathSearch
Allows you to search over 200,000 documents on English language mathematics and statistics servers across the web.

Mathworld
Described as "the web's most extensive mathematics resource," this site is sponsored by Wolfram Research, creators of Mathematica.

Project euclid
A mathematics and statistics site from Cornell University that offers open and partially open access to scholarly journals.  Full text searching is available.

Statistics and Statistical Graphics Resources
Provides an annotated, topic-based collection of available resources for statistics, statistical graphics, and computation related to research, data analysis and teaching. From York University.

Statistics Virtual Library
Well organized and comprehensive metasite for statistics from the University of Florida

University of Michigan Historical Mathematics Collection
A growing library of books selected from the University of Michigan mathematics collection that have been digitized to improve access. All of the books in this collection were published in the 19th or early 20th century.

Algebraic Number Theory Archives
Preprint archives for papers in Algebraic Number Theory and Arithmetic Geometry.

Algorithmica
Computer science, mathematics and Statistics Journal. Full text available since 1997 through SpringerLink.

Communications on Pure & Applied Mathematics
Features recent developments in applied mathematics, mathematical physics, and mathematical analysis. Available via Wiley Interscience Journals.

Directory of Mathematics Preprint and e-Print Servers
Makes available the current homepage URLs and email contacts of all mathematical preprint and e-print servers throughout the world. Provides mathematicians with a tool to find any of these servers in order to browse the articles posted on them and, in many cases, to post an article to the server itself.

Electronic Journals in Mathematics.
A list of electronic journals and journals published electronically as well as in paper. Maintained by the Department of Mathematics, SUNY at Albany.

Mathematics ArXiv
An (e)text archive of mathematical prints maintained by Los Alamos with a 'front end' at UC Davis. The Archive is searchable and allows browsing by any one of 30+ categories.

Mathematics Journals
Lists of mathematics journals with articles on the web and a list of web sites for printed journals.

American Mathematical Society (AMS)
Founded in 1888 to further mathematical research and scholarship. Site includes math news as well links to other resources.

Mathematical Association of America
Largest professional society that focuses on mathematics accessible at the undergraduate level

Society for Industrial and Applied Mathematics (SIAM)
SIAM exists to ensure the strongest interactions between mathematics and other scientific and technological communities through membership activities, publication of journals and books, and conferences.

Handbook of Mathematical Functions(Knovel Library)
Provides a comprehensive and self-contained summary of the mathematical functions that arise in physical and engineering problems.

Math2.org - Math Reference Tables
Includes a variety of tables, formulas, theorems, and proofs for all levels of mathematics.