I have been playing with this sophisticated XML editor for the past half hour and it looks pretty good. I can't commit to it, but this seems worthy of a mini-review. This is definitely a contender for a top ten editor if it lives up to its potential. And it's freeware
From their website
XMLPad 3 new features:
-- XML Schema full support.
-- New and improved look & feel.
-- Project system with CVS support.
-- XML Schema editor with color syntax highlighting, line numbers, element range navigation, and context-dependent source assistant wizard.
-- Preview and printing XML Schema in graphical diagram window. The diagram is synchronized with XML Schema editor.
-- XML Schema documentation generation (ws3p.xsl) with diagram images.
-- XML Schema validation and XML files validation against the underlying XML Schemas.
-- Very big schemas (such as uccnet or xCBL35) use XML Schema binary cache in their implementation that mitigated
performance issues in validation and analysis. Every schema used in validation is compiled in binary format
on first use and later could be loaded from cache.
-- Generation of XML samples from XML schema or a sample of XML Schema from XML file. Converting XSD to DTD and DTD to XSD.
-- Schema component renaming (refactoring), navigation between schema components (Goto definition/Goto reference)
and navigation from XML data to appropriate schema component.
-- Regular expression builder and enumeration builder.
-- Schema-aware XSLT editor and debugger with Active script support.
-- Support for JAXB and Castor binding.
-- HTML & DBF import.