Math & Computers

For specific programs or packages, see my software page

NIST Guide to Available Math. Software
Math, Stat., and CS at NIST
Netlib Repository a collection of mathematical software, papers, and databases.
The Geometry Center  Computation and Visualization of Geometric Structures
Numerical Recipes
Optimization Software
Templates for the Solution of Linear Systems (Iterative Methods)
The Living Mathematics Project
Mathematical Programming Glossary
Compendium of NP optimization problems
Algorithms Project at INRIA
Encyclopedia of Combinatorial Structures
Intro to Symbolic Computation
SymbolicNet
Mathtools Net software and algorithms
Computational low-dimensional topology
Math Forum: Computer Software for Math Education

Mathematica

The Mathematica Book v5.2
Wolfram Info Ctr  The Library of Mathematica-Related Materials
Mathematica Forum
Documentation Center

General

Metamath Logic and Set Theory
Eric Weisstein's World of Mathematics
PlanetMath.org
dmoz open directory project (comprehensive)
On-Line Encyclopedia of Integer Sequences
American Math Society
MathSciNet
ArXiv Front
ArXiv.org - e-Print archive
AMS Journals
AMS mathweb
Math Forum: Public Discussions
The Math Forum -  Math Library
Math Archives
Math Dept.'s
Ask Dr. Math
Historical Math Monographs

More Specific

Links to low-dimensional topology
British Topology
Ask a Topologist
Topology Atlas
Atlas of oriented knots and links (by Corinne Cerf)
KNOT
The Knot Theory Page (A course)
Knot Theory (ThinkQuest)
GANG Knot Library
Morwen Thistlethwaite's Page
Number Theory Page
ABC Conjecture - Nitaj
ABC examples
A more general abc conjecture
good ABC-Ratios
Some talks on ABC
Lehmer's Conjecture
Abstract Algebra Online
Algebra Course Notes
Interactive Real Analysis

Of Interest

Math Genealogy Project
Math Quotation Server
MacTutor History of Math
The Largest Known Primes
Prime Pages