7 Eye Trackers for testing & analysis

Eye tracking is the process of measuring either the point of gaze (where one is looking) or the motion of an eye relative to the head. An eye tracker is a device for measuring eye positions and eye movement. Eye trackers are used in research on the visual system, in psychology, in psycholinguistics, marketing, as an input device for human-computer interaction, and in product design. (Source: wiki)
A curated list of some good Eye Trackers is given below.

1. The Eye Tribe

http://theeyetribe.com/

2. Glance

http://www.mirametrix.com/

3. Smart EYE

http://smarteye.se/products/smart-eye-pro/

4. Tobii

http://www.tobii.com/

5. Eyetech

http://www.eyetechds.com/

6. Gazepoint

http://www.gazept.com/

7. SMI GAZE & EYE TRACKING SYSTEMS

http://www.smivision.com/en/gaze-and-eye-tracking-systems/home.html