I tutor the introductory physics material covered in AP Physics 1 and AP Physics 2. I received a score of 5 on the long-since discontinued AP Physics B exam, which covered the same material in one year that AP Physics 1 and AP Physics 2 take two years to cover.
The main resource I use with my students is the Khan Academy Physics Library. Other resources:
AP Physics 1 Course and Exam Description (official). This document includes additional multiple choice sample questions.
Every previous AP Physics 1 free-response question (official), including scoring guidelines, sample responses, and scoring distributions
Old AP Physics B questions (official), which are practically identical to AP Physics 1 and AP Physics 2 questions