Umoove - Face and eye tracking for mobile devices/gaming
Cheese - Cheese uses your webcam to take photos and videos, applies fancy special effects and lets you share...
WebGazer.js - Eye tracking on the browser
Webcamoid - Webcamoid is a full featured webcam capture application.
FOVE - An eye tracking virtual reality headset (pre-launch)
Cameroid - Just like Photo Booth - exept is online. Have fun with your webcam. Apply text and funny effects.