Webcamoid - Webcamoid is a full featured webcam capture application.
Greenshot - Greenshot is a free and open source screenshot tool that allows annotation and highlighting using the built-in image editor.
Kamoso - Kamoso is a webcam recorder from KDE community.
Shutter - Shutter is a feature-rich screenshot program.
Cameroid - Just like Photo Booth - exept is online. Have fun with your webcam. Apply text and funny effects.
Snipping Tool - Use Snipping Tool to capture a screen shot, or snip, of any object on your screen, and then annotate, save, or share the image