These free SAT prep sites are from an article by Esther Sinofsky in the November 1, 2012 issue of Booklist. I figured I'd share a few because she has some great recommendations!
College Board's Full Practice Testhttp://sat.collegeboard.org/practice/sat-practice-test
There's a full, free practice test for the 2012-2013 SATs here, although there is also a push to sell other practice tests.
Dome SAT Prep
http://www.domesatreview.com/
Dome SAT has a host of useful free study guides, vocab drills, and full practice tests.
I Need a Pencil
http://ineedapencil.ck12.org/
Educational non-profit CK-12 has a huge amount of free lessons and practice exam questions as well as a score projector that will identify strengths and weaknesses on the real deal.
