Adjust your iSight brightness, picture quality, brighten, focus, flip and rotate.
Update 2/19/06. I let the demo period of iGlasses expire, mainly because I just don’t use iSight or iChat often enough to care about the picture quality. In testing, the software seemed to perform as advertised, however. iGlasses installs as an InputManager and Component at the root Library folder, which is a little annoying since it means the install is system-wide. You aren’t given a choice in the matter, either, but you do get an uninstall utility if you need it.