Altova Enterprise XML Suite 

The Altova Enterprise XML Suite is a comprehensive XML development toolset that delivers the highest functionality and best product value. It includes Enterprise Editions of XMLSpy, MapForce, StyleVision, and SchemaAgent, plus the new SemanticWorks.
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Altova Professional XML Suite 

The Altova Professional XML Suite is a comprehensive XML development toolset that delivers tremendous functionality at a special price. It includes Professional Editions of XMLSpy, MapForce, StyleVision, and SchemaAgent, plus the new SemanticWorks.
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XmlShell - The Ultimate Lightweight XML Editor 

The Ultimate Lightweight XML Editor: 1.True side-by-side XML tree structural view and table/editor/browser views. 2.Grid-like table views to display table-like XML data. 3.Syntax-colored free-form text editor. 4.Intelligent popup list in editor.
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Aioob XML Database Converter and Aioob XML Editor 

With The Free Aioob XML Editor, you can edit XSL, XML, XSD, XSLT and FO documents. The Aioob XML Database converter can convert almost any data source (i.e. Text files, Excel workbooks, Access databases, FoxPro 2.x, ODBC data source e.t.c) into XML.
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XMLwriter XML Editor 

XMLwriter is a powerful XML editor for Windows designed to help web authors and web application programmers take advantage of the latest XML and XML-related technologies such as XSLT and XSD Schemas.
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Xselerator 

It's got everything an XSLT Editor should have plus a bit more like Intellisense and tag auto-complete! It's also half the price of XMLSpy... so it's great value. A 30 day free trial is available.
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