You can have your wizz wheel flight computer, non-programable calculator, plotter, compass, etc..
You need to also bring your Jepp manual for the flight planning, but usually one person will have to give their's up and have it replaced with one they have at the testing site, to help keep you honest.
You do not need to bring copies of the performance or mass and balance documents as they will be provided for you. A correct pencil will also be provided.
Good luck...I finally passed all of my exams last month and happy as can be to be done with it.