How to share components between apps

I know you’re gonnna say plugins, but bear with me.

I’m a Facebook app developer, and I have an array of different ones
going. I want them all to work off the same basic framework I’ve
created, but I’m not sure what the best way to do that is. This is what
I want to share:

  • various filters in the application controller
  • models to store users, etc, complete with the database table
  • an entire controller devoted to displaying stats
  • various display helpers
  • several plugins and config files

I don’t know much Ruby metaprogramming, can I accomplish all this with
plugins? Would it be easier to just individually pull all the shared
files from a common repository?