Sortable pictures
You can manage & sort pictures
How to use ?
Model
 class Model < ActiveRecord::Base
   sortable_pictures
 end
Controller
 def create
   @model = Model.find params[:id]
   picture = Picture.new params[:picture]
   if picture.save
     sortable_pictures = picture.sortable_pictures.new
     sortable_picture.picturable = @model
     sortable_picture.save
   end
 end
View
 <% @model.pictures.each do |picture| %>
   <%= image_tag(picture.public_filename :thumb) %>
 <% end %>
Configuration file
in RAILS_ROOT + config/sortable_pictures.yml
storage: :file_system file_system_path: 'public/images/sortable_pictures' content_type: 'image' thumbnails: :big: '500x500', :normal: '200x200' :small: '100x100' :thumb: '50x50'