OpenCart

OpenCart is a fiercely pragmatic, highly tactical open-source veteran that mathematically attacked the "Lightweight Self-Hosted" market. While Magento requires massive server farms to run, OpenCart engineered a highly efficient, incredibly lightweight PHP framework. It is the absolute weapon of choice for budget-conscious developers and international SMBs who mathematically demand a free, fast-loading shopping cart they can physically host on a $5/month DigitalOcean server.