AgoraCart aka Agora.cgi

A full featured free shopping cart system. Features: SSL and shared SSL support, image uploading, multiple sales taxes, online order management, UPS and USPS real-time shipping, unlimited custom shipping logic, handling fees, product options, flexible order forms, flatfile database with import/export functions, discount logic, static or dynamic product pages, product options editor, user fields for use in querying data and/or building dynamic pages, file updater, cross browser scripting security, and several real-time and manual payment options including Authorize.net SIM, LinkPoint Basic, eWay, PayPal, PayPal IPN, NiftyPay, iTransact, AgoraPay, Plug N Pay, 2Checkout, USAepay, Echo, and multiple payment options. Includes BuySAFE integration. Also comes with a powerful online store manager with many more tools.