SAT Practice
I Need A Pencil you set up an account. 800 practice exams and 80 lessons in math, reading and writing.
Sparknotes Test Prep Free site that also has PSAT and ACT prep.
100 Top SAT Words Vocabulary website for SAT words.

STAR (Standardized Testing and Reporting)
STAR Sample Questions Sample questions from the California Department of Education

CASHEE Practice
CASHEE Practice Test and Study Guide From the California Department of Education