Veiwing Nikon RAW (NEF) Files?

I want names of program in which allow you to view and, if possible, convert NEF files to any common types like JPG, BMP, PNG, etc. Thanks in advance!

Added (1). I got a Microsoft Windows XP SP3 running on a PC

Added (2). Man, that codec was HEAVY! But I'm downloading it, well, we'll see if it works or not.

Added (3). The codec made me able to view the file in the thumbnail view, still I need to process the files to JPG. Anyway thanks for your help!

Using a Mac, a PC, Unix platform?

You should have the software with your camera. Failing that, download this codec:
http://www.nikonimglib.com/nefcodec/
That should allow you to view/edit in Windows XP/Vista/7

RAW files are NOT converted. They are processed, leaving the RAW file unmolested and when the modified file is exported, you can choose if you want them to be JPEG, TIFF or DNG files. Just forget the term "convert" when talking about RAW files

You do that using programs like Adobe LIghtroom which allows you to process them in batches. I have processed over 400 files at one time, but I don't know if there's a limit to the number that can be done at one time.

Nikon sent a program which will allow you to process RAW files and save them to a new file folder as other type files.