I'm using the Template Toolkit for generating static web sites and I
am very happy with it.  Yet, despite the claims, it still mixes a lot
of presentation with program logic.

I am fascinated by the approach of tools like Iowa or Walrus, and how
clean they seem to make both the code and the development, yet they
seem to only target dynamic content.  Is there any templating system
written in Ruby that would be useful in building static sites?

Massimiliano