Ice Den: Skater Ice is a custom built online skating registration system built using PHP, CSS, MySQL and JavaScript.  This site also has a custom CMS to allow them to manage their site and create new registration groups.  Different than a normal cart shopping cart system this allows them to create new discount and product groups based on various customizable events.  This process used to be done solely by hand and I converted their manual process to an online workflow that has saved them considerable amount of time and speeding up this process for them.