The large majority of my work is in backend programming, I rarely do frontend design anymore. I usually produce tools that allow my customers to manage eCommerce store items with Excel, mass produce eBay templates and various other backend scripting/programming.
Two webstores that I actively manage, program, and host are:
These are both Ruby on Rails sites. I have also been working on an MVC framework of my own called KodeMonkey, though development on it has stalled until I find time to continue work on it.
You can check it out at: http://sourceforge.net/projects/kode-monkey/