XML Copy Editor is a fast, free, validating XML editor.
- DTD/XML Schema/RELAX NG validation
- XSLT
- XPath
- Pretty-printing
- Syntax highlighting
- Folding
- Tag completion
- Tag locking
- Tag-free editing
- Spelling and style check .

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

Symphony is an XSLT-powered open source content management system
It's a web-based content management system (CMS) that enables users to create and manage websites and web applications of all shapes and sizes—from the simplest of blogs to bustling news sites and feature-pack.



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.
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.





XSLT and XPath by the Apache-Team. There is a C++ and A Java subproject, allowing easy installation on a vast variety of systems.