ArborText
   A single-sourcing provider of Epic, an XML-based editing, conversion and publishing solution.
   http://www.ptc.com/company/arbortext/

DocuClass
   C++ source documentation add-in tool for Microsoft Word 97/2000.
   http://www.chartersys.com/

Making Pages
   PageMaker, PDF, web sites, HTML, and other aspects of desktop publishing. Home of the PAGEMAKR mailing list.
   http://www.makingpages.org/

Task Architect
   A software tool designed by human factors specialists for hierarchical task analysis. Suitable for complex system design, documentation or training materials.
   http://taskarchitect.com