Win-copy-paths-ext is a project mainly written in C++ and C, it's free.
Finally, a Windows copy path(s) shell extension that behaves just how I want.
Adds a context menu option to Explorer to copy the path(s) of the selected files and/or directories to the clipboard. Yes, another one. None of the extensions I could find behaved how I wanted.
The original code for this extension was written by Nick Carruthers and published at http://www.codeproject.com/KB/shell/copypathext.aspx.
Features:
A release version is present in the bin/ReleaseUMinDependency/
folder. To install it, do the following (you probably need administrative access):
CopyPathExt.dll
file and copy it to C:\Windows\system32
or a similar system path.regsvr32 CopyPathExt.dll
).