DocBook to LaTeX Publishing transforms your SGML/XML DocBook documents to DVI, PostScript or PDF by translating them in pure LaTeX as a first process. MathML 2.0 markups are supported too. It started as a clone of DB2LaTeX.
Voikko is a spell checking, grammar checking, morphological analysis and hyphenation system. Spell checkers are available for multiple languages, other features for Finnish only.