Whenever I start learning a new technology or language I tend to look at the source code of some 'real-world' applications. I find them really useful for understanding common, technology specific architecture, idioms and how/what popular libraries are used. I've recently started learning ASP.NET MVC, but haven't really found good open source apps. I was wondering if you know some worthwhile ones.
I am really interested in MVC apps that use IoC Dependency Injection libraries such as Windsor or StructureMap.