crack The GMAT

This site offers a free diagnostic test designed like the real computer adaptive tests, and the questions are of an actual test level. Thus it will give you an idea and feel of the actual test. The test also lets you compare your scores with those of other test-takers around the world.

Nova Press GMAT Page

Gives good overview of the GMAT exam and offers sections about software, strategies, books, test dates and diagnostic tests.

800score.com

Take free sample tests, learn test strategies, and get prep software for immediate downloading.

ETS – Educational Testing Service Network

Educational Testing Service is the world’s largest private educational testing and measurement organization and a leader in educational research. A nonprofit company dedicated to serving the needs of individuals, educational institutions and agencies, and governmental bodies in 181 countries, ETS develops and annually administers more than 11 million tests worldwide.

GMAT Tutor.com

GMATTutor.com is the first website with independent advice that will help you ace your GMAT and get into the business school of your choice.

Peterson’s GMAT Center

A bit of free stuff, but mostly Peterson’s paid GMAT materials are on offer at this site.

Kaplan

Bills itself as the world leader in test prep, admissions and tutoring.

MBA Applicant.com GMAT Forum

Learn about the GMAT, take a free tutorial and get your questions answered by a pro.