Snap2HTML takes a "snapshot" of folder structures on your harddrive and saves it as HTML files. What's unique about Snap2HTML is that the HTML file uses modern techniques to make it feel more like a "real" application, similar to Windows Explorer, displaying a treeview with folders that you can click to view the files contained within. There is also a built in file search. Still, everything is contained in a single HTML file that you can easily store or distribute.
Website: https://rlvision.com/snap2html/about.php

Icon: https://rlvision.com/snap2html/icon.png
Download: https://rlvision.com/downloads.php?dl=snap_2_html
Saves settings: No
Requirements: .Net Framework 2.0
License: Freeware
[Full changelog is at https://rlvision.com/snap2html/whatsnew.php