Alternative Mice -- These mice utilize an alternative means for moving the cursor, such as a rollerbar or steering pad and can be operated with a finger as opposed to your whole hand.  They also are relocated to a more centralized location just in front of your keyboard, allowing you to keep your hands and arms in close to your body as well as allowing you to switch hands easily to lessen the strain on just one hand throughout the day.

Contoured Mice -- These mice share one primary feature in having a contoured or sculpted shape that more closely matches the contours of your hand, thereby allowing your hand to very naturally grip the mouse without having to strain the muscles in the hand or fingers.

Vertical Mice -- While traditional mice place the orientation of the hand at or near horizontal to the mousing surface, vertical mice eliminate this forearm twisting and turn the hand into a more natural, upright position.

Touchpads -- These devices are the same as those you would find on a ltypical aptop where you have a pad that allows you to move the cursor on the screen by dragging a finger across the pad.  Here we offer external, stand-alone touchpads that can be used in any number of scenarios.

Trackballs -- This style of mouse utillizes a large ceramic or metal ball that sits in a concave, depression on the mousing unit, and to move the cursor you simply rotate the ball forward, backward, side-to-side, etc.  The ball can be rotated in literally any direction with the use of your fingers without ever moving the base of your hand. 

Hands Free / Assistive -- Specialty mice that allow you to reduce or eliminate altogether the use of your hands to perform general mousing operations.