What rails plugins are good, stable and *really* enhance your code?

Question

Anyone have a list of rails plugins that are both stable and give you enough functionality to be worth the extra effort of supporting?

Edit:

I am mos

Answer 1

Try resource_controller. http://jamesgolick.com/2007/10/19/introducing-resource_controller-focus-on-what-makes-your-controller-special

It seriously dries up your RESTful controllers. And is the only plausible way of implementing polymorphic actions that I've come across.

Loads of other good stuff too. Give it a try.