Tobii Eye Tracking is a complete eye tracking solution that includes both hardware and software to create natural human-computer interactions using a combination of eye-gaze and other user input.

Getting started

These articles are recommended reading for anyone who wants to get started with developing eye-gaze enabled applications.

Tobii Unity SDK for Desktop 3.0

Here is a migration guide how to move from Tobii EyeTracking SDK for Unity 5 – v2.0 (Beta) to Tobii Unity SDK for Desktop 3.0:

Tobii EyeX Plugin for UE4