PLiX (Programming Language in XML) is an XML-based code-generation framework. Generators produce XML matching the PLiX.xsd schema, which can be formatted into multiple languages. Extensible formatters support C# and VB.NET in Visual Studio 2005 and 2008
NHag - NHibernate Automated Generator - is an advanced Codegenerator. Based on the hbm.xmls it can produce class code (in VB.NET and C#), Cell- and MVP-based abstraction layers and test scenarios (Test-DB and Unit Tests) for the generated classes. It's