Software :: Offline Applications For Website Content

I am considering creating a new website with a number of relative links. By this, I mean something similar to a wiki where inside a given page are links to other terms/ideas on other pages (in the same site). In reality, what I plan to link to/from are various articles which are inter-related but not entirely encyclopedic in nature (as many wikis such as wikipedia tend to be).

I am looking for two applications which I can use offline (I think--if you think I need something else, open to all ideas):

An offline application that is *very* simple at allowing me to create content articles as described above and to preview that the relative links work (if need be through a browser or some sort of preview) such that once I put them online I will have little/no necessary clean-up to ensure relative links still work. My articles will have both images and text and I also want to be able to relatively easily move the images around where I want them without having to mess around with HTML directly too much. The more WYSIWIG/visual, the better.

While I'm at it, any recommendations of how to easily get this content online?Also, can I worry about the template (CSS or whatever) later or do I need to do that right from the start? (Sorry, haven't done this stuff in about 3 or 4 years and my memory is lacking.)I use Ubuntu 10.04 and am trying to avoid KDE at the moment.