Altova XMLSpy!

XML Copy Editor is a fast, free, validating XML editor.

<oXygen/> XML Editor is a cross platform XML Editor providing tools for XML authoring, XML conversion, XSL, XSLT, XQuery, XML Schema, DTD, Relax NG and Schematron development, SOAP and WSDL.

XML Notepad provides a simple intuitive user interface for browsing and editing XML documents.

TreeLine just stores almost any kind of information. A tree structure makes it easy to keep things organized. And each node in the tree can contain several fields, forming a mini-database. The output format for each node can be defined, and the output can be shown on the screen, printed, or exported to html. TreeLine can also act as a basic editor for any kind of XML file.

Firstobject's free XML editor for Windows is called foxe.

Makes working with XML as fast and convenient as never before. XML ValidatorBuddy is your XML and JSON editor to edit, validate, transform and manage even a large number of XML documents. The unique File Explorer with XML related enhancements enables everyone to work with XML in a convenient and efficient way.

The simple yet actually fast source-level XML Editor XML Marker uses a combination of syntax-highlighting editor, tree view, and table views to help you get better insights of your XML code.

XML Tools Provider: XML Studio - Graphical XML Schema Editor. XML Data Binder - Generate C++, C#, Java, VB .Net, Visual Basic classes from any XML Schema (XSD, XDR, DTD).

XML Tree is a basic cross-platform tree view XML editor. It displays XML files as tree views and allows basic operations: adding, editting and deleting text nodes and their attributes. The main goal is providing a simple tool to create/edit XML configuration files for users without knowledge of XML.

[A Free Academic License is offered for teachers and students of an XML course.]

Stylus Studio® 2010 XML Enterprise Suite is an advanced XML Integrated Development Environment (XML IDE) consisting of hundreds of powerful XML tools in one all-inclusive suite, and high-performance Java & .NET components to design data integration applications. It features tools for working with XML, XQuery, XML Pipeline, XSLT, XSL:FO, EDI, XML Schema/DTD, XPath, XML & Databases, XHTML, XML mapping, XML publishing and Web services.

XPontus XML Editor is a simple XML Editor oriented towards text editing. It can perform validation (DTD, XML Schema, Relax NG, Batch XML validation), XSL transformations(HTML, XML, PDF, SVG), schema/DTD generation, XML/DTD/HTML/XSL code completion, code formatting and much more.

EditiX is a powerful and easy to use XML editor, Visual Schema Editor, XQuery Editor and XSLT debugger for Windows, Linux and Mac OS X designed to help web authors and application programmers take advantage of the latest XML and XML-related technologies such as XSLT / FO, DocBook and XSD Schema. EditiX XML Editor now comes in two editions. EditiX Free XMLEditor Lite is free for non-commercial environments and can be downloaded without registration.

The Exchanger XML Editor is a Java-based product that provides unique functionality for viewing, authoring and editing XML data and documents. Last version was opensourced in 2010: https://code.google.com/archive/p/exchangerxml/downloads

XMLmind XML Editor allows to author large, complex, modular, XML documents. It makes it easy mastering XML vocabularies such as DocBook or DITA.