Webcamoid - Webcamoid is a full featured webcam capture application.
Kamoso - Kamoso is a webcam recorder from KDE community.
Cameroid - Just like Photo Booth - exept is online. Have fun with your webcam. Apply text and funny effects.
GTK+ UVC Viewer - guvcview is a video viewer and capture software for the linux UVC driver.
wxCam - wxCam is a webcam application for linux.
QtCAM - QtCAM is free Open Source Linux Webcam software. Try Qt based Linux camera software application for security surveillance & communication. Capture videos from multiple cameras.