EYESACC has its own built-in eye-tracker that works right in your browser. It's been carefully optimized and GPU accelerated (if available), giving a fine precision (at maximum distance of 60cm from screen) and an incredible sample-rate over 250 fps average (while not drawing gaze points, depending on browser's capabilities and GPU speed).

Shortcuts:  C = Show/Hide Calibration Points    E = Show/Hide Gaze Points    W = Show/Hide webcam image