Options include bench press, overhead press, lat pull down, vertical butterfly, rowing or long pull, and biceps and triceps extension. For some people, increasing body tone may be less important than improving cardiovascular strength and stamina. There is a variety of equipment to address this. Most commonly known are table top type hand cycles. However to increase circulation in the legs, choose a cycle that you can pull up to in a wheelchair that provides straps or boot supports for the feet.
Motion is provided by pedaling with the hands but legs get a workout too.
Here are some other possibilities. If a skiing motion is more appealing, a portable ski exerciser may be used standing or even sitting in a chair, with the motion provided by the hand's movement on the poles. Just slip the sling seat down the back and underneath the torso and begin seated bouncercise. One claim made is that this form of exercise stimulates the lymphatic system, increases circulation and burns calories. A nice gentle way to wind down from a workout would be to sit in a rocking chair.