Webcamoid - Webcamoid is a full featured webcam capture application.
DroidCam - DroidCam – Use your Android phone as a wireless webcam or an IP Cam!
Kamoso - Kamoso is a webcam recorder from KDE community.
Iriun Webcam - Use your phone's camera as a wireless webcam in your PC or Mac.
Cameroid - Just like Photo Booth - exept is online. Have fun with your webcam. Apply text and funny effects.
iVCam - iVCam transforms your Mobile Phone / Pad into a webcam for Windows PC.