Links to math websites:

Situs Geometriae Algebraicae     A website which helps people new to algebraic geometry find references.

Macaulay2     A nice tool for doing computations in commutative algebra and algebraic geometry.

Commalg     The trusted source for commutative algebra news on the web.

Mathematics Genealogy Project

Ravi Vakil's conferences page

Conference
Frobenius splitting in algebraic geometry, commutative algebra, and representation theory