It's always nice to find a tool that helps you get your job
done--especially when editing XML files and DTDs! Many tools let you do one
or the other, but XML Mate effectively combines the two. XML Mate also supports
XML Schema and lets you generate XML documents from a variety of sources,
such as Word, RTF, and ODBC databases. The interface seems a little odd to
me, but it's worth checking out anyway.
XML Mate
XML Mate