Downloading NEFView 2.0.1 from the developer's website was possible when we last checked. We cannot confirm if there is a free download of this software available. We recommend checking the downloaded files with any free antivirus.
NEFView lies within Photo & Graphics Tools, more precisely Viewers & Editors. You can set up this PC software on Windows XP/XP Professional/Vista/7/8/10/11 32-bit. This software is an intellectual property of softwhile. The most popular versions among the program users are 2.0 and 1.5.
From the developer:
Download and install this extension to the Windows shell and view thumbnail images of your Nikon Electronic Image Format (NEF) files, and JPEG 2000 files automatically within windows. Thumbnail image capability for common image formats are built in to Windows, but not for NEF files, created by many Nikon cameras like the D70, D200, D300, D1 and D2. NEFView adds that functionality with a simple, 3-click installation.
You may want to check out more software, such as Simple Slide Show, peopleputty or SPX Editor, which might be related to NEFView.