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The free open source tool 'Enable Viacam' enables people who cannot use a computer mouse or trackball to control the mouse pointer through small movement of their head. The software works with a normal webcam (30 FPS needed). It also allows clicking/dragging. The functionality of a standard hardware mouse remains intact, which makes it possible to control the mouse arrow with Enable Viacam while clicking can done with a hardware mouse or a switch.

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