Feature Requests, Contributions, Bug Reports, Source-Code: GitHub
The standalone application can be found here (works from the command line and explorer context menu).
You can also have a peek at my initial article over on CodeProject if you like.
Find Unused Files
Visual Studio 2012/2013/2015 Plug-in
Find and eliminate unused images & files in web projects/applications
This extension helps you parse a website solution or project to find and eliminate unused images or other orphaned file types that are not being referenced in your sourcecode anymore.
Files can actually be of any type, but will most likely be images that you wish to remove from a website you are working on.
Windows Explorer (context menu)
Visual Studio (context menu)