Creating a checkout process like http://www.sitepoint.com/books/freepdf/

[marcel]

I'm really impressed with Sitepoint's checkout process at http://www.sitepoint.com/books/freepdf/

How do I get one like it ?

[EC Suite_Russell]

That is kind of cool, a nice clean and smooth design. I wonder if they used a third party shopping cart system for the checkout or maybe just their own programming?

[Ted S]

Given what's in the system I'd imagine it's either custom or a lot of customizations to something out of the box. It also feels like a much different interface than the actual order process, perhaps the two were merged?

I'd suggest finding a cart with features you like and looking into modifying the checkout process to meet your exact needs.