my favorite from that is kote gaeshi.
the captured arm is held firmly against your own back (as close to your own center from behind as you can, if possible). The free arm reaches up behind you as you move your body forward. The free hand takes hold of ukes wrist and you turn your hips and body in the direction of that arm (right arm takes, turn to the right.. or vice versa).
The movement of the hips with the grip on ukes wrist allows the captured hand to come out between the thumb and the fingers of uke. as you turn uke ends up in front of you with his wrist in your hand, your other hand is now free to fold the fingers and perform as dynamic a kote gaeshi as you wish
very difficult to explain, but very simple and extremenly effective to pull off.