Cross platform Text editor that supports JavaScript, XML, SVG and XUL files [Commercial]

Windows editor and tools for XML and other file formats. Includes tools for validation, importing from HTML, and transforming using XSL(T) [Freeware]

Rainbow XML editor makes editing XML easy. By clearly visualising your data as a series of nodes, Rainbow allows you to focus on manipulating data rather than having to worry about creating correct XML syntax [freeware online editor]

XML Editor for editing XML in a tree structure and with input fields. Supports mapping to tables and refactoring operations. Suitable for any XML based format. [Commercial]

A free xml editor designed to be a very simple editing tool for xml documents [Freeware]

Provides a simple intuitive user interface for browsing and editing XML documents [Freeware]