Altova XMLSpy - The XMLSpy XML Editor is a powerful tool for editing XML and related technologies. It is the only XML Editor with patented SmartFix validation, enterprise-grade editors, converters, debuggers, and code generators.
TreeLine - TreeLine just stores almost any kind of information.
XML Copy Editor - XML Copy Editor is a fast, free, validating XML editor.
XPontus XML Editor - XPontus XML Editor is a simple XML Editor oriented towards text editing.
Oxygen XML Editor - Oxygen XML Editor provides a comprehensive suite of XML authoring and development tools.
Stylus Studio - Stylus Studio® 2010 XML Enterprise Suite is an advanced XML Integrated Development Environment...