DTM Schema Inspector is a database schema browsing and management too that let the user work with database schemas more effectively. The program lets the users work simultaneously with any number of database schemas.
... documents editing for is tool valid validation well-formed Schema. XMLFox schema editor enables you to easily develop advanced data models expressed in XSD Schema.
Stylus Studio XML IDE features XML Editing, Debugging, Testing/Benchmarking & Deployment Tools for any XML technology, including XML Schema, DTD, XSL/XSLT, XPath, XQuery, XML Mapping, ...
DTM Schema Comparer is a visual database schemas comparison tool (ODBC,OCI,OLEDB). The comparison process supports tables, views, indexes, triggers and stored procedures. View database schemas as a tree makes the comparison process more comfortable.