The Kensington SlimBlade Bluetooth Trackball Mouse is at the top of this group, it is wireless, battery driven by two AA batteries with up to a six month life span and the ability to warn you when the batteries are low. This mouse is responsive and easy to handle. You never have to worry about turning it off, as it goes to sleep when your computer does.

The SCT Micro Trac 600 has three programmable buttons located on the top. The miniature track ball is centrally located. This trackball is a good replacement for your touchpad and uses the PS/2 port or serial interface port on your computer.

A new and interesting contestant in the mini trackball field is the finger mouse. This mouse literally fits over your index finger, the track ball is controlled by your thumb, as are the two buttons, the enter button is a trigger button located inside the finger hole, triggered by your index finger. This would work great in a situation like being in a plane or other tight quarters. It is currently corded so that would be a feature to look forward to.