Penpal

There are several people living with motion-related disorders such as Parkinson's disease and essential tremor. These people encounter a lot of trouble trying to write. Thanks to technology, Penpal is a device that has been carefully designed to assist them and take no cognizance of their shaking.

With Penpal's stabilizing technology, your pen will shake an average of 70% less than your hand, so you can worry less about the letters and more about the words. source