I’m not sure if this is what you are looking for. The programs on this page are all offline viewers. They grab a page, or an entire site and save them on you local HD where they can be veiwed off-line. Not that server side functions, such as searches will probably NOT work, but for reference sites you want to keep handy on a USB drive these programs would work well.
These are freeware – remember to check for viruses!
These are a mix of freeware, shareware and commercial: