Latex or Docbook? This is a question.

-- Latex + lyx
-- Docbook
-- AsciiDoc
-- Sphinx

More ..

http://www.sange.fi/~atehwa/cgi-bin/piki.cgi/stx2any#hdl10

txt2tags (http://txt2tags.sourceforge.net/)
reStructuredText (ReST) (http://docutils.sourceforge.net/rst.html)
deplate (http://deplate.sourceforge.net/)
Grutatxt (http://www.triptico.com/software/grutatxt.html)
Markdown (http://daringfireball.net/projects/markdown/)
Textile (http://www.textism.com/tools/textile/)
Simple Document Format (SDF) (http://cpansearch.perl.org/src/IANC/sdf-2.001/doc/paper/sdfintro.html)
Almost Free Text (AFT) (http://www.maplefish.com/todd/aft.html)
asciiDoc (http://www.methods.co.nz/asciidoc/)
Structured Text, as available in Zope (http://www.zope.org/)
Almost Plain Text (APT) (http://www.xmlmind.com/aptconvert.html)

Structured text formatters