I used my Cartcake shopping cart script for the now defunct IC Events to sell a digital compilation music album of unsigned scottish rock musicians, and coded a "limit downloads" plugin for it, so files can only be downloaded once.

I also used Cartcake for Jessica Russell Flint so she could sell some prints of her illustration and run an event for a water charity to sell other illustrators work.

I coded my PETMI script for the now offline Eurovision Song Contest Time website, so they could import their 250MB mysql database as it was too big to be restored with cpanel or phpmyadmin.

Also I did some A/B testing setup with Liv Juice with the help of Visual Website Optimizer.

I did some work for Deck Finesse for theming the site.

Also I've done some work for Handmade Marketing for the Gill Aggregates website editing CSS.