I am using Ruby on Rails 3.0.9 and I am planning to add a simple "Contact us" form to my application in order to make it possible that a user can contact our team. For that I would like to run validation and "friends" functionalities and (to avoid to implement that myself and) to use a third party software, but...
... what gem (or plugin) do you advice to use? what is the most widely "approved" gem for this kind of things?
Of course I would like to use a gem in "active developing" (that is, whose developers are active).