Umbraco Forms, Umbraco Deploy, and Umbraco Workflow are commercial products.
Umbraco Forms
With Umbraco Forms, you have a 14-day free trial to try out the product. After your trial expires, you'll need to have a valid license to keep using the product on your site.
Umbraco Workflow
Umbraco Workflow is a licensed product that does not require a purchase. New installations defaults to a trial license while the paid license is available for purchase.