XSD Object Generator
Found this tool on MS Downloads some time back, used to generate sample C# & VB classes from a XSD schema.
The Sample Code Generator (XSDObjectGen) tool takes an XSD schema as input and generates sample code showing how to mark up C# and VB.Net classes so that when serialized with the XML serializer, the resulting XML will be valid according to the original schema.
If Visual Studio .NET is present, will also install a new XSD project type in the C# and VB.NET project types.
It seems to work a bit better than the XSD tool that ships with VS.NET.