I have gathered from other posts that it depends on where you are taking your exams.
I have taken the exams in the UK. Here is what is allowed:
1. Scientific calculator is allowed, but not programmable
2. You need to know all formulas by heart; no notes allowed
3. You are allowed to use the Jepp Navigation Student Pilot Manual on certain exams
4. Your CRP is allowed to be used on certain exams
Remember, this was only my experience in the UK. I have read from others that no Jepp manuals are allowed in some countries, etc.
Good luck