Open source projects which were built with PHP MVC style (or using frameworks)?
I want to understand PHP MVC better. 

What are the best open source projects which code I could study? I don't mean frameworks, but websites which are built using PHP MVC or PHP framework.

One example - OpenCart which is built using PHP MVC technique. 

So, do you know any other open source websites which are written in great code? 
Open source projects which were built with PHP MVC style (or using frameworks)?
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I want to understand PHP MVC better. 

What are the best open source projects which code I could study? I don't mean frameworks, but websites which are built using PHP MVC or PHP framework.

One example - OpenCart which is built using PHP MVC technique. 

So, do you know any other open source websites which are written in great code? 