Logitech's MX Ergo says scram to cramps and brings back the trackball
http://newatlas.com/logitech-trackball-mx-ergo/51236/
Using a computer mouse day after day can be a bit cramp-inducing, so to help take the strain off Logitech is launching the MX Ergo, its first trackball in years. The device has been refined from previous models for extra comfort, including a hinge to adjust its angle.