Paperclip lets you attach files to database tables; unlike Attachment Fu, Paperclip works by adding several columns to an existing table. (Attachment Fu creates a new table and model.)
You can find out more information at the Paperclip homepage, http://www.thoughtbot.com/projects/paperclip.
Author: Thoughtbot
Installation:
ruby script/plugin install git://github.com/thoughtbot/paperclip.git