I tried out OB1 around the same time I found K-Meleon. Also Act 10, 404, and some I've forgotten. Any that stayed around for more than 24 hours were there because I forgot about them. Even for off-line use, they didn't seemt worth keeping.
What I like for quick viewing off-line and even for - well, here I am, using it for this - is the demo browser from
http://www.pbear.com/
I had been using an old version of the viewer for off-line viewing for some time, no idea where I got it from. Finally got down and searched out the site. It comes with source (Delphi), so you can build your own.
Thought I might as well toss this into the soup