Virtuemart

capable of using Secure Sockets Layer (https) Encryption (128-bit)
flexible Tax Models
- Model 1: ShipTo Address-based Tax Calculation
- Model 2: Store Address-based Tax Calculation
- Model 3: EU Mode (Store Owner based Tax Calculation when Customer comes from an EU Country)
Shoppers can manage their User Accounts (registration required)
Shipping Address Management (Customers can enter their own Shipping Addresses)
Order History: Shopper can view all their previous Orders (and Order Details)
Order Confirmation Mail (customizable!) is sent to Shopper and Store Owner
Multiple Currencies (you can allow Customers to change the Currency and buy using an alternative Currency)
Multiple Languages (using the Joomla! Component Joom!Fish or Nooku).

Powerful Web-Administration Interface (Javascript-powered)
Manages an unlimited Number of Products and Categories
Can be used as a Shop or just as an Online-Catalog (you can even turn off Price Display)
quick Search for Products, Categories and Manufacturers; filter by features or discounted Products
Product Ratings & Testimonials (moderated or auto-published)
feature specific Products by setting them "on special"
Product Availability: show how fast a Customer can expect delivery
Handles downloadable Products (virtual Goods)
"Product is back in Stock"-Notification for subscribed Customers

multiple Images and Files (like Spec Sheets and Flyers) per Product
Product Attributes (like Size or Color) can be added to Product
Product Types for Classification (like "Car", "Motorbike" or "Music Album")
Shopper Groups for Customers (allows different Price Levels and Payment Options),
multiple Prices per Product (Quantity-based and/or Shopper Group-based Prices)
flexible Price Display (number & currency formatting; including or excluding tax)
On-the-Fly Price Conversion between different Currencies using Live Rates from the ECB or other banks
Shop Statistics / Control Panel with a Summary of new Customers, new Orders....
Stock Level Control for Products and Item
Order Management with Order History, Customer Notification and Order Edit Functionality
basic Reporting Feature: sold Items, monthly/yearly Revenue
Order Status Management
manage different Currencies, Countries & States

capable of live Credit Card Processing
pre-defined Payment Gateways like authorize.net®, PayPal, 2Checkout, eWay, Worldpay, PayMate and NoChex
extend your Shop with other Payment Modules using the Payment Module API!

flexible Shipping Carriers and Rates Configuration
Live-Shipping Rates using Shipping Modules (e.g. InterShipper, UPS, USPS, FedEx or Canada Post; Modules can use the Shipping Rate API).
extend your Shop with other Shipping Modules using the Shipping Module API!

Features virtuemart