Brand: Intercomp
This precision digital level from Intercomp is great for measuring chassis rake, wing angles, and more.  The large, backlit LCD displays the exact angle from 0 to 90 degrees in 0.05° increments.  
Magnets set into the bottom and sides let you stick it to any ferrous part for hands-free use.  If you need to stick it to the underside of the chassis, don't panic -- the display can be rotated 180 degrees for right-side-up viewing with no nosebleeds.  The compact 2 1/4" square case is small enough to use almost anywhere.  Runs on a rechargeable battery (included). 
Note: This angle finder is not designed to accept any of the Intercomp camber attachments.  The measured angle is from horizontal to a line running left-to-right across the bottom surface (parallel to the readout).  This is 90 degrees to the angle that a camber gauge reads.