4Tests.com - Prep information for standardized tests: includes MCSE/MCSD, SAT, ACT, CLEP exams, LSAT.

So You Wanna - Tips for the GRE, SAT, and LSAT.

Quizzer - Has many different vocabulary categories to choose from. For SAT, PSAT, vocab preparation.

Barronseduc.com - Publisher of test-prep books for the New York State Regents exams, ASVAB, COOP, SSAT, CHSPE, and many other standardized tests.

Learnatest.com - Academic and professional test preparation and career resources, including grade school, SAT, ACT, law enforcement, firefighter, EMT/Paramedic, real estate, postal worker and military.

Writing Exam Tutorial - This site helps prepare you for the writing section of standardized tests, such as the GMAT, GRE, LSAT, MCAT, NTE, and others.

MCAS Preparation Software - Information for preparing for the MCAS Examination.

Cambridge Ed - Campus-based and self-study test prep curricula for major standardized tests.

Advantage Education - Courses and online tutoring for major standardized tests. Located in East Lansing, MI.

Master Tutor - Tutorial website offering IGNOU's CIC, BCA and MCA courses.

GMAX - Preparation for the SAT, GMAT, TOEFL, and GRE. Also offering spoken English courses. Based in Tel-Aviv.

ScholarStuff - Test preparation books, links and resources about preparing for the SAT, GRE, LSAT, MCAT, and TOEFL tests.

Richardson Exam Prep - Offers live prep courses in Toronto, Canada and test information.

Scholastic Testing Systems - Comprehensive SAT, ACT, PSAT preparation with Studyguide, support tools and scholarship search software. College entrance test programs available for students or entire schools.

Now College - Now College offers e-learning courses, online academic tutorials and test-prep programs.

Inspirica - test prep and admissions consulting.

ExamWeb - Started as a way to study at home that is more effective than reading books, taking paper-based practice exams,  listening to audio tapes and gazing at the VCR.

REA Online - Test preparation for a wide variety of college and graduate school standardized tests including AP exams and the SAT.

Teachers' Treasures, Inc. - Provides teachers and parents educational resources to assess students mastery of essential skills. Offers the TAAS Busters and TEST Busters product lines.

Prep USA - Offers on-line and nationwide SAT and ACT test preparation classes and information. Also college and scholarship help.

The Princeton Review - provider of SAT, ACT, and TOEFL test preparation information including books and software.

ANR Publishing - SAT and ACT study aid in flash card form, 400+ cards covering English and math.

Test Prep by Arco - Information for the GMAT, GRE, and LSAT from Arco test prep.

SkillsTutor.com - Online skills courses for adolescents and adults preparing for the GED and state exit tests.

ExCET Prep - ED Publishing, publishers of Pass the ExCET on Your First Try. Program includes: Study outlines, worksheets, CD, memorization techniques and study exercises.

Exam-Central - Offers NCLEX, firefighter, EMT, EMT-I, paramedic, law enforcement, civil services, and military exams by subscription.