Otto is one of the world's biggest e-commerce companies.
XYZScripts.com provides Otto clone script - XYZ Shopping Cart
It is a PHP+MySQL powered script to create your own shopping cart site.
XYZ Shopping Cart is enriched with features like unlimited categories, brands, unlimited products, multi quantity pricing, deals options, multi vendor addon and much more. Within minutes you can create an online shopping site like Otto.
XYZ Shopping Cart - Otto Clone Script details