Callahan Screen Saver displays images filled with dark humor as your screen saver or wallpaper. Callahan Screen Saver includes 16 images dealing with religion, gender politics, violence, race issues, toilet habits, and so on. You can enlarge the images to fit your screen, display a pop-up navigation bar when you move the mouse, and show picture titles. The screen saver displays the images as a slideshow. You can configure it to change the images after a specified time interval (in seconds), display them in sequential or random order, and use any of the 14 transition effects. You can also send the image collection using the built-in e-mailer, download more collections from the Web, switch between collections, and view the entire collection in thumbnail format. The program can run as a convenient icon in the System Tray area of the Windows taskbar. Please note that several images in this screen saver may not be suitable for children.