NFO and Diz Viewers

NFO or Diz files normally contain information about a software program. NFO files are common and sometimes are elaborate and highly decorated, included a large ASCII art logo along with software release information. The designers of these NFO files frequently incorporated extended ASCII characters from the then near-ubiquitous code page 437 character set in the file.
I have listed below, some Free NFO Viewers which you can use to view the files as they were originally meant to be seen.

Many downloadable ZIP archives have NFO and Diz files included within them. Sure, they are simple text files that can be viewed with Notepad, but GetDiz is a freeware text-viewer especially designed for those files. Small, handy and specific.
Download Get Diz

DIZzy displays DIZ, NFO and other ASCII-extended text files. Supports drag-and-drop, file associations and command line. Amazingly small, self-contained, flexible and free program.
Displays UNIX, MAC and binary files
Reversed-color mode option.
Download Dizzy Viewers

NFOPad is a combined nfo viewer and text editor. It is a clone of Microsoft's Notepad but with extra settings, and support for nfo files. The file extension is used to determine whether to use an ANSI or ASCII font. NFOPad also fully supports Unicode.
NFOpad link

Compact NFO Viewer - popular viewer for text files containing ASCII Art and description files (NFO/DIZ/TXT).
Compact NFO

DAMN NFO Viewer is NFO and DIZ file viewer with full ascii art view featuring shell intergation, Hyperlinks autodetection and most Recently Viewed Files list.
DAMN NFO Viewer