CortexML
Schema management software that provides support for XML versioning, XML Evolution Management (XEM) and centralized schema control.
LMX: XML Schema to C++ binding compiler
Easy-to-use tool for compiling XML schema into C++ classes.
Microsoft .Net Online Schema Validator
Allows you to validate an XML documents against a W3C XML Schema or an XDR schema, verify the schemas are valid, or simply check the well-formedness of XML documents.
Microsoft XSD Inference
Generates an XML schema from a sample instance.
OSS Nokalva XSD Tools
Binds XSD schemas to C/C++ representations; produces XML and binary encodings based on X.694; and validates XSD schemas and XML instances
Pedro
Dynamic form generation, XML Schema, data validation, controlled vocabulary services.
Schema2Java
generates run time Java code from arbitrary W3C XML Schema
SchemaViewer
Free viewer for XML Schema documents. Allows you to quickly and easily browse the contents of any W3C-compliant XML Schema.
Stylus Studio XML Schema Tools
Tools for visual XML schema editing, conversion, validation, schema documentation generation and XML schema mapping.
Sun Multi-Schema XML Validator
Sun's MSV is a Java technology tool to validate XML documents against several kinds of XML schemata. It supports RELAX NG, RELAX Namespace, RELAX Core, TREX, XML DTDs, and most of XML Schema.
Sun XML Instance Generator
Java tool to generate XML instances from a W3C XML Schema, RELAX or TREX schema, or a DTD.
TIBCO XMLValidate
SAX-based implementation for validating streaming XML documents or messages against an XML Schema or DTD
XML Schema Quality Checker
Alphaworks software that takes as input an XML Schema written in the W3C XML schema language and diagnoses improper uses of the schema language
XML Validation
Web-based XML validator that produces easy to read error messages and asks for missing files (e. g., XSD) if necessary.
xs3p Schema Documentation Generator
Uses a stylesheet to generate a reader-friendly XHTML document from an XML Schema
xsddoc
Open source tool that generates W3C XML Schema documentation in the form of multiple cross linked html pages.
XSV: W3C Validator for XML Schema
Web form for checking a schema which is accessible via the Web, and/or schema-validating an instance with a schema of your own.