Most Square Effects photography can be purchased through Cafepress.com.  There are multiple print options available as well as many other items.  Many of the most popular photographs are available on clothing, clocks, mugs and coasters, mousepads, pillows, hinged boxes, and more.  If you are looking for a particular design/product combination and it's not currently offered at Cafepress, please let me know and I will make it available.

To visit Cafepress, click this button:

Below is a screenshot from the main storefront at Cafepress: