Kamoso - Kamoso is a webcam recorder from KDE community.
Webcamoid - Webcamoid is a full featured webcam capture application.
Cameroid - Just like Photo Booth - exept is online. Have fun with your webcam. Apply text and funny effects.
MyCam - Record videos and take pictures with your webcam, open image or video files and apply with amazing photo filters and video 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.