Good Gear Guide
In Pictures: 35 open source and free tools to mana...
This customizable and secure open source ecommerce shopping cart can be integrated in to an existing website. Expect to find cart features such as customizable templates to design your Web shop, support for multiple product categories and options for different tax rates in addition to back-end store management tools. AgoraCart is PA-DSS and PCI-DSS compliant and supports more than 10 payment gateways. The free community edition (5.2.x) is supported though online community forums.
In Pictures: 35 open source and free tools to manage your online store