I barely used ClarisWorks, but was very familiar with its BeOS-based successor, Gobe Productive. It was an incredible application; I used it as my primary office suite for years. It was just so well-integrated and thoughtfully designed; I have yet to see its equal.

Whether this kind of brilliant integration and thoughtfulness is something that could carry over to the kind of comprehensive feature sets of Microsoft Office or Libre Office is a valid question. My hunch is that it could. I wish somebody would try.