SmartNav by NaturalPoint (http://www.naturalpoint.com/smartnav/ http://www.naturalpoint.com/smartnav/). I'm using it for over 8 years for moving the cursor. Cli

SmartNav by NaturalPoint (http://www.naturalpoint.com/smartnav/ http://www.naturalpoint.com/smartnav/). I'm using it for over 8 years for moving the cursor. Clicking is via a regular mouse, though voice and switches are supported. All typing is done through an on-screen virtual keyboard (Hot Virtual Keyboard). After short self-training the speed and accuracy are above of a regular mouse. Neck fatigue is a rare issue even after 8-10 hours of daily usage, the "trick" is calibrating the settings for minimal movement. I'm using this setup for everything from programming to some light gaming (RTS). Adjusting and configuring the environment can bring substantial improvement. For example, using ReSharper for Visual Studio vastly reduces typing.