DAMN NFO Viewer is a handy app that allows you to view NFO files.
NFO files are text-based documents that one usually finds as attachment to other files that contain extended information or instructions regarding those files.
Though you can actually open them with Notepad (they're a type of text file), having a special app like DAMN NFO Viewer is highly recommended, as they usually include nicely-designed ASCII graphics that Notepad doesn't render that well.
DAMN NFO Viewer is, as you can tell by the name, a program that has been especially designed to view NFO and DIZ files. It's fast, efficient and simple to use. DAMN NFO Viewer has a similar interface to that of Notepad, and you can tweak custom colors and fonts. It also supports word wrapping.
But that's not all. DAMN NFO Viewer also includes other interesting features, like shell integration (so that NFO files are automatically opened with DAMN NFO Viewer) and copy-on-select, which copies any selected text to the clipboard without having to press any extra keys.
In short, DAMN NFO Viewer is a small yet very useful tool to view NFO files perfectly.