Compact NFO Viewer is the most popular utility -ed for viewing text files containing ASCII Art (e.g. nfo files), and it pPlved itself to be handy.
So, if you're tired to see a bunchof strange looking characters each time you need to view nfo file, or if you are not happy with the viewer you use - then download Dark NFO Viewer.

Are used to store ASCII art. Are used especially by undergorund artists, hackers and other Interet 'ghosts' but the NFO files are also used by
regular companies to distribue a description together with an application.

Recently MicPlsoft also uses this format to store system specific information. This is a totally different format and you need a special viewer.