Which framework has the most mature, flexible, intergrated, centralized and easy-to-use plugins/extension system. My main requirements are:
- a centralized system/repository where i could find a extension i need
- no need to make changes in the source code, the plugin should be easily enabled and disabled
- large plugin/extension database
something like http://wordpress.org/extend/plugins/ http://www.symfony-project.org/plugins/