AraSuite is a set of tools (previously as separate projects: AraWord, TICO, AraBoard) for AAC. Really well done and implemented set of tools.
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OptiKey - Full computer control and speech with your eyes
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Dasher is an information-efficient text-entry interface, driven by natural continuous pointing gestures.
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Eye Blink Scanning Keyboard with Morse entry option
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The Open Voice Factory - open software for people with communication difficulties
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Software based head mounted laser/light tracking system using a standard webcam
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