Enable Viacam is described as '(aka eViacam) is an open source mouse replacement software that moves the pointer as you move your head. It works on standard PCs equipped with a web camera. No additional hardware is required. Based on the award winning Facial Mouse software' and is an app in the Education & Reference category. There are four alternatives to Enable Viacam for Windows, Linux and Mac. The best alternative is OpenGazer, which is both free and Open Source. Other great apps like Enable Viacam are camera mouse (Free), GiMeSpace Cam Control (Free) and EagleEyes (Free).
EagleEyes is a technology that allows the user to move the cursor on the screen of a Windows computer by moving his or her eyes or head. Basically, the cursor follows the location that the user is looking at on the screen. The eyes replace the mouse.