Automatic Python API documentation generation tools:
DocUtils, http://docutils.sourceforge.net/ ReStructuredText processing engine
PythonDoc - uses ReStructuredText input format, and can produce HTML and XML output. It uses XML as an intermediate representation, to simplify the addition of new output formats. http://starship.python.net/crew/danilo/pythondoc/
Another PythonDoc - uses JavaDoc-style comments. http://effbot.org/zone/pythondoc.htm
["Crystal"] - produces output that is similar to JavaDoc.
EasyDoc - uses an HTML-like markup language, similar to the language used by JavaDoc; and produces HTML output (http://htmltmpl.sourceforge.net/easydoc.html)
["Teud"], TeudProject
Other projects that can be used to produce API documentation:
[http://www.livinglogic.de/Python/xist/index.html XIST] - an XML based extensible HTML generator written in Python.
[http://starship.python.net/crew/friedrich/HTMLgen/html/main.html HtmlGen] - a Python library for generating HTML documents.