http://4Suite.org/
"a collection of Python tools for XML processing and object
database management."
Stilo
"Stilo WebWriter is the most comprehensive editor for creating XML. Its ease
of use and advanced visual concepts make it the most cost-effective product
available today."
The Modern English Collection
"This heterogenous collection contains fiction, non-fiction, poetry,
drama, letters, newspapers, manuscripts and illustrations from
1500 to the present, arranged for browsing by author's last name
or by category of interest. Each text is encoded in SGML and
includes a bibliographic header with details about the creation
of the electronic text and its print source."
PSGML - a GNU Emacs Major Mode for editing SGML files
