◼ Quickly customize your webcam's settings while using iChat/Messages, FaceTime, or Skype on your Mac - Softpedia
◼ Mactaris' Webcam Settings 1.0 makes it possible to adjust the settings of a USB webcam (or internal iSight/FaceTime cam) while using a video-capable application such as Skype or iChat. - MacInTouch
Webcam Settings is the 1st and only Mac app, which lets you improve the image quality in real-time when using your USB webcam with your favorite video application such as FaceTime, iChat/Messages,or Skype. Webcam Settings is a very useful and user-friendly OS X utility that will help you quickly adjust your USB webcam's settings.
Webcam Settings allows you to adjust settings including the exposure time, contrast, saturation, and white balance temperature for your webcam, whether it’s a Built-in iSight, a more recent FaceTime/FaceTime HD Camera or an external USB webcam.