It sounds like all you're looking for is something to convert
Word and FrameMaker files to HTML. This is only one part of what
RoboHelp does. RoboHelp's main function is to give you the ability
to author HTML help topics, along with a TOC, glossary, and index,
and produce a finished, self-contained help system with those
components (and a search capability if you want one).
My personal opinion is that if all you are looking to do
outside of Eclipse is convert the Word and FM files to HTML,
getting RoboHelp--and any of the other major help authoring
tools--is probably overkill. It would be a lot of money for one or
two features.
You may want to check out the
HAT matrix site to find out what
will mostly closely meet your needs. There may also be other tools
available out there on the Web that will simply take Word and
FrameMaker documents and convert them to HTML.
There may be additional opinions from other forum-goers,
too.