Tools for editing, generating and testing XPath 1.0 and XPath 2.0 expressions.

Includes tools, components, tutorials, videos demonstrations, whitepapers, use cases and discussion forums.

Article by Michael Kay introducing an important new feature of XQuery and XSLT 2.0: support for XML schemas.

Development tools for editing, mapping, debugging, and profiling (benchmarking).

Commercial IDE for creating, validating, and debugging XSL, and XML-to-XML mappings. Integrated XSLT, Java, and MSXML debugger.

Tool to debug XSL transformations which is part of Stylus Studio. [Commercial]

Sonic Software's platform for an XML development environment that includes an XML Schema editor, XSLT editor, XML-XML mapper, debugging and document wizards. [Commercial]

DTD editor, DTD Generation, DTD validation, DTD conversion, and industry standard DTD catalog support.[Commercial]

Tools for visual XML schema editing, conversion, validation, schema documentation generation and XML schema mapping.

Tools for building XML-enabled Java/J2EE applications, including a JSP 1.0/2.0 editor, Java IDE, support for Java XML components including Xalan, Xerces, Saxon, and Java Web services. [Commercial]