PySource, by Tony Ibbs, is an experimental Python source Reader. In some form, it will soon become part of core Docutils. There is some related code in David Goodger's sandbox (pysource_reader) and a Python Source Reader document.
Docutils interface to PythonPoint, also by Richard Jones, produces PDF presentations using ReportLabs.
Engelbert Gruber has begun LaTeX Writer and ManPage Writer components.
? has taken over ReportLabs/PDF Writer components.
Oliver Rutherfurd has begun a DocBook Writer component and HT2HTML integration component.
Gunnar Schwant's DocFactory is a wxPython GUI application for Docutils.
Aahz has begun an OpenOffice.org Writer.
Ian Bicking is working on code for a Wiki.
Bill Bumgarner has written a simple HTML writer that doesn't rely on CSS (stylesheets).
Beni Cherniavsky has written a generic preprocessing module for roles and/or directives and built preprocessors for TeX math for both LaTeX and HTML output on top of it.
Beni Cherniavsky maintains a Makefile for driving Docutils, hoping to handle everything one might do with docutils. "