I have worked on cairngorm and mate frameworks. I started with cairngorm framework. It is good to work but difficult to understand in the beginning. It handles event dispatching cleverly. You can dispatch events from classes itself and it will be taken care of by the framework wired command classes. There is single repository for storing the data, so easy to handle the data. It is a singleton class. Once you get a hold of the framework, work is easier.
Mate on other hand is tag based framework. It is an event driven framework, so all events are handled in the eventmap file. It does event listening, property injection, and many other things from this class itself. You can dispatch events from the classes by passing it the instance of framework event dispatcher. You don't have to use singleton class like cairngorm in this. You can bind property in a class to views using directly using property injection so no need to use any singleton class. In mate all the classes and view are free from framework code, so it is decoupled framework. It is easy to move components from one place to other.
