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http://www.actstudent.org/index.html ACT Official Site – test dates, sign‐up, scores, practice and more
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http://www.learnatest.com/LEL/index.cfm/?HR=http://scdiscus.org/ Learning Express Library: Offers practice tests and skill building exercises for the SAT, ACT, GED, ASVAB, career preparation and more.
http://www.majortests.com/ "Majortests.com has free practice tests with hundreds of practice questions, test prep advice and information." SAT, GRE, GMAT, and vocabulary world lists (including PSAT).