For a design agency called Heroes For Hire I'm loosely involved in, I coded two scripts called Cartcake and Casey.

Cartcake is a shopping cart script which was needed as our clients required flexible theming options.

Casey is a content management script designed for websites of which the content area isn't always in the same place on every page.

Casey is suited for portfolio websites, and each page can be assigned a different template. The fact that pages can have file and media attachments, and them be displayed on pages, also helps.