design-pattern libraries ready-to-use?

Question

symfony has released some of their components free to use outside the framework.

i have used the event dispatcher and dependency injection...they are awesome!

i wonder if there are other components/libraries (from other frameworks etc) that in the same way help you manage various design patterns?

eg. decorator, facade, singleton, chain of commands etc.

i think symfony is on the right path, simplifying the usage of design patterns.

are there any other components out there doing the same?

thanks

Answer 1

The Zend framework takes this approach to the extreme as the entire framework is broken down into components which can be used on their own.