Webcamoid - Webcamoid is a full featured webcam capture application.
FOVE - An eye tracking virtual reality headset (pre-launch)
Kamoso - Kamoso is a webcam recorder from KDE community.
WebGazer.js - Eye tracking on the browser
Cameroid - Just like Photo Booth - exept is online. Have fun with your webcam. Apply text and funny effects.
Breaks For Eyes - A Mac app to get rid of eye strain, dry eyes and fatigue