Cheese - Cheese uses your webcam to take photos and videos, applies fancy special effects and lets you share...
Greenshot - Greenshot is a free and open source screenshot tool that allows annotation and highlighting using the built-in image editor.
Webcamoid - Webcamoid is a full featured webcam capture application.
Shutter - Shutter is a feature-rich screenshot program.
Kamoso - Kamoso is a webcam recorder from KDE community.
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