Recent versions of WHMCS introduce a feature called " Product Bundles ". The idea is simple - a single link combines a number of products, possibly with a specific set of Configurable Options . These combinations can then be assigned discounts unique to that Bundle. This comes in handy for a variety of different scenarios, for example in WHMCS instances where multiple brands are in play and you want to run a sale on a single brand that is still sold on other sites. I recently encountered a situation that involved integrating a pre-existing pricing form within a CMS platform (think Joomla/Wordpress/Drupal/etc) with an order form and series of products with WHMCS. Not only did the signup buttons on the CMS page for each product need to connect to the corresponding WHMCS order form page, but pricing and product details on the CMS page needed to be generated dynamically from information stored in WHMCS, because updating two platforms to make simple...