The Addon Pack 1 contains some great additional stacks to make your websites looking great, and also gives you all of the advanced forms stacks, so you can create really powerful forms. This pack include over 20 stacks! Before you purchase this pack, you will need to already own the Starter Pack. If you are new to Foundation, there is a discounted bundle. Make sure that you head over to the Foudation for RapidWeaver website for more information.