Free Turnkey Shopping system?

I want to sell some products, there are turnkey templates that enable one to create a shop very easily, like this one here.
http://php-shopping-cart-scripts.built2go.com/index.php/35
That company does fantastic turnkey solutions, but I don't have the money to afford it, are there other turnkey templates or solutions for those with little or no money at all to create a store.

 

oscommerce
oscmax
cube cart
all are free and great

 

http://www.opencart.com/
http://www.oscommerce.com/

 

Thanks for those links, they look great.
Id like a shop for ebay, they have a good affiliate program, I see this can build a store for ebay
h ttp://www.buildanichestore.com/
But it costs 50 pounds, are there any cheaper or free programs like that one for ebay stores?

 

Zen-Cart is the best open source free shopping cart.

 

zen is good i have used it to
i have used all i have listed.
it really depends on what your looking for
each has different options

 

Are there any for ebay, or perhaps ones we could use with an affiliate, like amazon, I know amazon has iframes and feed, but its another option if we have a system to build up a store using affiliate products.