Negative tilt keyboards: Keyboards with raising legs on the front
edge of the keyboard, enabling them to be tilted to provide a more level surface
for typing. This reduces problems associated with bending the wrists back while
typing, including Carpal Tunnel syndrome. You can easily raise the front of a
normal keyboard yourself, but note that a flat keyboard allowing close to no
wrist tilt is the ideal, so raising it higher than this may harm more than it
Monitor Arms: Can be used to position monitors independently. Keep in mind that the top of the monitor should be positioned at eye level or lower, and at a comfortable distance to reduce eyestrain.
There are many other types and categories of ergonomic
products available, so do a little researching if you need a piece of gear to relieve a particular stress.
Other online resources you may wish to check out include an excellent interactive computer ergonomics primer, a guide to good posture and stretching exercises, and perhaps even an RSI sufferer's story. This website has good list of common repetitive strain injuries and information also.