» BusinessWeek GMAT Prep    Advice on taking the GMAT test and sample practice tests.    http://www.businessweek.com/bschools/gmat/

» Graduate Management Admission Council    An educational association provides information about MBA programs, financing, student preparation products and GMAT registration.    http://www.gmac.com/

» Manhattan Review    Preparation courses in Germany, and MBA admissions consulting.    http://www.review.de/gmat-en.html

» The Delta Course    Online GMAT study course, test debriefings, and advice on stress. Practice test with immediate feedback. [Requires subscription]. Offers daily GMAT practice questions by e-mail.    http://www.deltacourse.com/

» The Princeton Review: GMAT    Provides classroom and online courses.    http://www.princetonreview.com/mba/testprep/testprep.asp?TPRPAGE=3

» Veritas    Offers preparation and one-on-one tutoring centers.    http://veritasprep.com

» Wikipedia: GMAT    Article that gives an overview of the Graduate Management Admission Test.    http://en.wikipedia.org/wiki/Graduate_Management_Admission_Test