Either open hardware or (non-standard) hardware specific code (e.g. firmware/drivers). Code for standard webcams or common mobile phone OSes does not fall into this category.

chorder

by clc

Chorder input device. See: http://chorder.cs.vassar.edu/(link is external)

P4ALL-Affect-Sensing-Module

by P4ALLcerthiti

A C++ module for stress detection using Emphatical Sensors. This module is developed within the premises of the Prosperity4All FP7 project. http://www.prosperity4all.eu/(link is external)

echo

by toddmedema

For controlling local devices with the Amazon Echo

IRremoteESP8266

by crankyoldgit

Infrared remote library for ESP8266/ESP32: send and receive infrared signals with multiple protocols. Based on: https://github.com/shirriff/Arduino-IRremote/(link is external)

touchegg

by JoseExposito

Linux multi-touch gesture recognizer

acat

by intel

Assistive Context-Aware Toolkit (ACAT)

alexa-home

by zachfeldman

Using Amazon Echo to control the home!

PointAndControl

by teco-kit

Using the MS Kinect sensor to select objects around you by pointing

inputsimulator

by michaelnoonan

Windows Input Simulator (C# SendInput Wrapper - Simulate Keyboard and Mouse)

uSpeech

by arjo129

Speech recognition toolkit for the arduino