If you think about to create the business online then think about the WordPress. WordPress is the platform in which you can create the good site for your business. I suggest WordPress because its open source and there are lots of free WordPress plugins and help available for the WordPress community.
If you want to develop eCommerce site in WordPress then variety of free eCommerce WordPress themes available. If you are going to create the site for big business then there is one more option of the buying premium WordPress themes.
Here i am discussing the free WordPress themes for eComerce which are is easy to configure, and offers integration options. The list given below come with some of the most popular (free) ecommerce plugins, and simple paypal Shopping cart.
Virtue Free WordPress eCommerce Theme
Petshopper Free WordPress eCommerce Theme
Petshopper is a free responsive free WordPress theme design specially for the pets and animals category. It is also eCommerce theme which has the already inbuilt functionality of the sell products for the pets. The below download link originally taken from the yithemes.com site.
MEMENTO Ecommerce WORDPRESS THEME
Memento is a flexible corporate and creative free wordpress theme. Memento theme is clean, corporate and original design. Seo Optimized, powerful and with a lot of options Bearded eCommerce WordPress Theme.
KIDSHOP free wordpress theme
GLOBE free eCommerce WordPress Theme
Globe is a free WordPress theme and e-commerce website or simply a corporate. Built on the Yithemes 2.0 framework, Globe has many possible functions and it is easy to use.