Kaplan GRE Test Prep: Download a free demo of the GRE test.
Princeton Review: Take a free, full-length practice GRE and find different ways you can prepare for the GRE CAT test through classroom courses, private tutoring, small group tutoring, online courses, and books.
ETS Sample GRE Questions: Take GRE sample verbal, quantitative, and analytical tests and get your on-line results in seconds. Check this site out!
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GRE On-line: Official site loaded with test preparation information, including on-line registration, sample questions, and computer-based testing, and software to download. (Don't miss this official site!)
Peterson's Test Prep: This page offers free test preps, hot tips and sample test questions.
The Kaplan Home Page: Read over some practice questions and learn some helpful hints on taking the GRE and GMAT. Here is a shortcut to Kaplan's Legendary Test Preps.
PrepDoctor.Com: Try out PrepDoctor software free of charge and take a timed test on-line.