1.Xmlwriter.net
XML Editor, XMLwriter for Windows, is a powerful award-winning XML development tool that supports XML, XSLT, DTD, XSD Schema, CSS, and HTML editing. Within the editor you can convert XML to HTML using XSLT stylesheets, or format and preview XML documents using CSS. XMLwriter has an intuitive, customizable user interface with advanced editing functions. Additional features include: XML Help, Project Management, Real-time Syntax Coloring, Batch and Command Line Processing, Expandable DTD/XSD Schema View and more!