When budget is your main concern, PrestaShop is a strong option. A truly, 100% FREE E-commerce website builder that makes it easy to open your online shops. It offers competitive features in multiple languages and is used by more than 300,000 online stores. 

Key features:

• Customize your store and display your products in a unique way
• Powerful catalog and site management, allows you to manage a complex inventory easily with one-click updates
• Improve your SEO, through functions such as Run the SEO of my store, Run the SEO of my product & CMS pages
• Connect your store to social networks
• A one-page checkout makes it easy for customers to buy
• Up to date information about the location where customers are taxed or promotions by merchants
• Analytic and reporting on your performance