This document discusses and compares the top 5 e-commerce shopping cart software options. It begins by explaining the importance of shopping carts in converting site visitors to buyers. Some key findings are that 65% of occasional shoppers and 52% of frequent shoppers use carts as wish lists. The top 5 cart software mentioned are Magento, osCommerce, ZenCart, Shopify, and OpenCart. Each is described in 1-2 sentences highlighting their market share and distinctive features. The conclusion reiterates that the list provides information to help choose the best cart software.