Comic Reader Pro is a program for displaying comic books in the cbr and cbz formats. It will also display any folder of images. It is designed around the principal that nothing should get in the way of your viewing.
It always runs in full screen mode so you aren't distracted by other open windows. It does not waste screen space displaying an unnecessary toolbar.
You don't have to point the mouse to a scrollbar to scroll - the mouse always scrolls. You don't have to point to an icon to advance to the next page - the left mouse button always turns the page (and the middle button turns back a page.) Keyboard controls are also available.
You can adjust to a comfortable zoom level with smooth scaling, then when you come to a full page spread simply hold right mouse button down to snap out to full page view.