This is what it says in their site about this ::
Mate is a tag-based, event-driven Flex framework.
Flex applications are event-driven. Mate framework has been created to make it easy to handle the events your Flex application creates. Mate allows you to define who is handling those events, whether data needs to be retrieved from the server, or other events need to be triggered.
In addition, Mate provides a mechanism for dependency injection to make it easy for the different parts of your application to get the data and objects they need.
Now that’s a simple and clear description about the Mate Framework, explore the website to know more.
I have been exploring it and not yet included them in my live projects [have to learn more about them to do so].And the documentation is pretty simple and clear.The description about the Mate purely tells that it follows MVC Patterns.
Worth to give a try. 
Posted by kumargandhi 
