There are a couple that I can think of:

1) Between the hand and the arm is the wrist, which is actually made of Radial-Carpal joints and intercarpal joints.

2) The radioulnar joint, of which there are 2:

1 - The distal radioulnar joint is formed between the head of the ulna and the ulnar notch on the distal radius

2 - The proximal radioulnar joint may be considered part of the elbow, but is actually where the radial head articulates with the radial notch of the ulna.