Lets create a massive list of all ecommerce platforms. I’ll start…

I’ll continue to update the list as platforms are added to the comments.
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2Checkout – http://2Checkout.com
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3DCart – http://www.3dcart.com
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Amazon Webstore – http://webstore.amazon.com/
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Americommerce – http://www.americommerce.com/
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ASP.net Storefront – https://www.aspdotnetstorefront.com/
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Bigcommerce – http://bigcommerce.com
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BroadLeaf Commerce – http://www.broadleafcommerce.org/
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CleverBridge – https://www.cleverbridge.com
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Commercev3.com – http://Commercev3.com
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CoreCommerce – https://www.corecommerce.com/
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CS-Cart – http://www.cs-cart.com/
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Demandware – http://www.demandware.com/
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Drupal Commerce – https://drupal.org/project/commerce
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Easy Cart – http://www.easycart.com
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eCrater – http://www.ecrater.com/
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Ecwid.com – http://Ecwid.com
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Enstore – http://www.enstore.com/
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FoxyCart – http://foxycart.com
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Goodsie – http://goodsie.com/
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Hybris – http://hybris.com
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IBM WebSphere Commerce – http://ibm.com/software/products/en/websphere-commerce
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Intershop – http://intershop.com
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Jadasite – http://www.jadasite.com/
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Jooy – http://www.jooy.com/
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Jumpseller – http://jumpseller.com/
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Kalio – http://www.kaliocommerce.com/
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LemonStand – http://LemonStand.com
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Magento – http://magento.com
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Magento Go – http://go.mangento.com/
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Marketlive – http://www.marketlive.com
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Miva Merchant – http://www.mivamerchant.com/
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Moltin – https://molt.in/#top
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Mozu – http://www.mozu.com/
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Neto – http://www.neto.com.au/
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Netsuite SuiteCommerce – http://www.netsuite.com/portal/products/netsuite/ecommerce/products.shtml
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OpenCart – http://www.opencart.com
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Oracle ATG Web Commerce – http://www.oracle.com/us/products/applications/commerce/atg/
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PinnacleCart – http://www.pinnaclecart.com/
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PrestaShop – http://prestashop.com
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ProductCart – http://www.productcart.com
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Shopify – http://shopify.com
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Shopio – http://www.shopio.com
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Shopizer – http://www.shopizer.com/
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ShopVisible – http://shopvisible.com
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Softslate – http://www.softslate.com/
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SpreeCommerce – http://spreecommerce.com
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Squarespace – http://Squarespace.com
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Storenvy – http://www.storenvy.com/
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Supadupa.me – http://supadupa.me
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Sylius – http://sylius.com/
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Tictail – https://tictail.com/
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TomatoCart – http://tomatocart.com
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UltraCart – http://ultracart.com
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Volusion – http://volution.com
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Wazala – https://www.wazala.com/
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Woocommerce – http://www.woothemes.com/woocommerce/
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X-Cart – http://www.x-cart.com/
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Yahoo Store – https://smallbusiness.yahoo.com/ecommerce
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ZenCart – http://ZenCart.com
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Znode Storefront – http://www.znode.com