Directory of Professional Master's Degree Programs in the Mathematical Sciences
Programs in the US, by state or by type of program. From the AMA.

Education Resources from The Association for Women in Mathematics
Resources for students and educators.

Graduate Assistantship Directory from the Association for Computing Machinery
Search by institution or review geographic listings.  Also additional educational resources.

Gradschool.com
Comprehensive on-line guide to graduate schools, including international institutions.

Graduate Education in Math
Suggestions and strategies for grad students.

Graduate Programs in Statistics
Directory of programs in Statistics and closely related fields.

Graduate Study in the Computer and Mathematical Sciences
A guide for applying to and surviving grad school.

Graduate Studies Information from The Mathematical Association of America
Fellowships, stipends and resources for graduate students.

Mathematics Graduate Programs
Links to graduate programs in mathematics in the U.S., from Harvey-Mudd College.

Opportunities, Awards and Programs
Fellowships, awards, prizes and stipends from the American Mathematical Association.