WebGazer.js - Eye tracking on the browser
MobileFence - Parental controls for Android devices.
FOVE - An eye tracking virtual reality headset (pre-launch)
Boomerang Parental Control - Boomerang Parental Control helps parents start conversations with their children's technology use: App Controls, Text Monitoring, Time Limits and more.
Jabberwocky - Communicate through text to speech by moving your head
Qustodio - Free parental control software. Monitor and track your child's online activity. Block dangerous sites and protect kids from online bullying.