1)   SchemaAgent 2008
Altova SchemaAgent 2008 is the visionary tool for analyzing and managing XML Schema, XML instance, XSLT, and WSDL file relationships across a project or an enterprise. Visualize and easily manage file associations via its graphical design interface.
XML schema, schema manager, schema design, complex schemas, manage schemas, schema repository, schema relationships, manage XSLT, manage WSDL, XSLT relationships,