Number theory links

• New items of Number Theory Web
• Number Theory Web (Main site)
• Number Theory Web (Italian site)
• Number theory groups and seminars
• Journals specializing in number theory
• Number Theory Listserver Archives
• Kevin Brown's number theory page
• Dave Rusin's number theory page
• Algorithmic Number Theory: Tables and Links
• The Prime Pages
• The Fibonacci Numbers
• On-Line Encyclopedia of Integer Sequences

Mathematical and other links

• MathSciNet
• Zentralblatt MATH
• Referativnyi Zhurnal - Matematika
• Jahrbuch Database
• JSTOR
• Combined Membership List
• MR Lookup
• MRef
• MR Citation Database
• Mathematics Journals
• Master Journal List - Thomson Scientific
  
• Scopus
• American Mathematical Society
• European Mathematical Information Service
• International Mathematical Union
• Croatian Mathematical Society
• Mathematics Departments
• Biographies Index
• Mathematics Archives
• Math Forum
• Eric Weisstein's World of Mathematics
• Encyclopaedia of Mathematics
• Wikipedia
• PlanetMath
• Intute
• Mathematical Gateways
• Mathematics WWW Virtual Library
• Mathematics Web Sites
• Mathematics ArXiv
• Cryptology ePrint Archive
• CiteSeer
• Google Scholar
• Google Book Search
• Mathematics Genealogy Project
• Open Directory Project/Science/Math
• Math Overflow
• sci.math.research
• Publishers
• amazon.com
• Barnes & Noble.com
• abebooks.com
• Google
• Yahoo