Look at your family photo album. Doesn't everyone look tired – or drunk? Just look at how bloodshot everyone's eyes are!
Many digital photo programs (Picasa, iPhoto, and the programs that came with your digital camera) have software that can help correct red eye, at least somewhat. But why make do with a minor league editor, when you can use a behemoth of a photo editor that can turn red eyes – or hair, faces, or any other feature – into any other color you can imagine, let you integrate photos, add animations, turn your pictures into a sketch, cartoon, poster, or even a postcard – for free!