Example Simple PHP MVC Projects

What are some good examples of open source PHP projects built using the MVC architecture.

I searched and found this question which asks a similar question, but all the answers have focused on particular frameworks. I'm looking for actual built applications to use as case studies. I don't mind if the project uses these frameworks, but my focus is on the completed projec开发者_开发百科t, not how the framework works.

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The SleekMVC framework comes with a sample application...