class_accesssor

dude.rb

class Dude < Person
  awesomeness "SUPER AWESOME"
  intellect 80
end

# Dude.awesomeness #=> "SUPER AWESOME"
# Dude.new.intellect #=> 80

person.rb

class Person
  class << self

    def class_accessor *method_names
      method_names.each do |method|
        (class << self; self; end).class_eval do
            define_method method do |*args|
              args.first.nil? ? instance_variable_get("@#{method}") : instance_variable_set("@#{method}", args.first)
            end
          end
        define_method method do
          self.class.instance_variable_get("@#{method}")
        end
      end
    end
  end

  class_accessor :awesomeness, :intellect
end