What's an SSG? I've gone and tried to look it up on wikipedia, but there's nothing that appears to be relevant.

  > In a wiki the data is usually
  > laid out hierarchically.

What? No. In a wiki the pages are semi-automatically linked. Go and look at the very original wiki, the very first one by Ward Cunningham[0]. Pages are linked completely according to the text, and there is absolutely no hierarchical structure. Even wikipedia has no hierarchical structure because of being a wiki. It has some structure, but that is imposed independently.

You then also say:

  > ... not using a browser ...

So it would appear that we have established that what you want:

* Isn't editable through a web interface - unlike a wiki

* Has some sort of hierarchical structure - unlike a wiki

* Doesn't use a browser - unlike a wiki

So what you want is, in fact, not a wiki. That leads me to wonder what you do actually want. You seem to want to have some pages that use markdown (or something), and are somehow arranged in a hierarchical manner, and then somehow presented in that hierarchical manner, but without using a browser.

So I don't understand what you want. Here are some questions:

* You say you want the files in some sort of hierarchy - how is that defined?

* How do you envisage a user accessing this static "site" given that you said you don't use a browser?

* After you make a change to a page, do you initiate the re-building of your static site manually, or do you envisage some sort of automated process?

* Where is your "simple static wiki" stored, in order to be accessible?

* Is it just you accessing it? Or is it open to others?

Answers to these (and many other) questions might help us understand what you actually want.

Just don't call it a wiki.

[0] http://c2.com/cgi/wiki?WelcomeVisitors