Design Patterns used in Zend Framework
I am preparing talk about general architecture of Zend Framework, and wanted to summarize Design Patterns used in it.
I believe it will be beneficial both for those knowing ZF and learning DPs, and for those knowing DPs and learning ZF. In a former case, one would be able to see real-world application of patterns, and get a better comprehension of framework in the second.
Even brief answers in a form Zend_Contoller_Front: Singleton are good enough, if a little elaboration is provided (for some not-so-obvious cases) it will be even better.
I am primary interested in GoF patterns, as they seem to be the starting point of any DP-adventure.
UPD: Not directly related, but for those who know Java there's extremely complete answer for GoF's DP examples found in Java core.
Answer
Since this is a CW now, I'll add the patterns I already gave in the comments:
Zend_Controller_FrontSingletonFrontController
Zend_Db_TableTable Data Gateway
Zend_LogFactory MethodAdapterComposite
Zend_FormCompositeDecorators
Zend_FilterandZend_ValidatorStrategy