Features

Product attributes (e.g. color, size)
Stock management by product attributes (such as, color and size)
Product tags
Configurable checkout attributes (such as «Gift Wrap» or «Enter custom message»)
Configurable customer attributes (such as «Date of birth», «Phone number»)
Individual prices can be specified for individual customer groups
Allow customers to enter product price (if enabled)
Allow store owner to hide prices for non-registered customers
Products can require that other products are added to the cart (Product X requires Product Y)

Downloadable products supported
Downloadable products. License file can be attached
Downloadable products can have an user agreement
Downloadable products. Configurable download activation type: ‘When order payment status is Paid’ or ‘Manual activation’
Text options on products (e.g. require initials for monogrammed products, require text name for product customization, etc)
Support for simple products (e.g. a book) or products with variants
Support for sale prices
Product search

Reward Points System
Ability to assign design on category, manufacturer or product (unique design per category/manufacturer/product)
Supports related products
Marketing manager (Email campaigns)
Customer groups can be marked as free shipping
Customer groups can be marked as tax exempt
Search Engine Friendly URL’s
Automated URL Re-Writing
Every product, category and manufacturer page can have their own custom search engine meta tags, page title
Customize default SEO meta tags
Store news items supported. News RSS. News comments
Require administrator approval of product reviews for all reviews (if enabled)
Product review helpfulness (“Was this review helpful for you?”)

Supports discounts
Supports coupons
Discount amount can either be a fixed value or a percent off. e.g. $10.00 off or 20% off
You can specify a start date and an end date when the coupon is valid
Discounts can be assigned to products
Discounts can be assigned to categories
Discounts can be assigned to whole order
Discounts can be filtered by a customer role
‘Had purchased all of these product variants’ discount requirement
‘Had purchased one of these product variants’ discount requirement
‘One time only’ discounts
‘One time per customer’ discounts
Discounts can be assigned to shipping fee
Discount Usage History
Volume discounts (Tier prices)
Customers can review & rate products (if enabled)

Recently added products page. RSS.
Recently viewed products page
Free Shipping Option
Polls supported
Store blog supported
Forums supported
Supports affiliate programs
Froogle (google base), PriceGrabber / Yahoo Shopping, become.com product feeds
Google XML site map
Customizable email templates
Completely customize the layout & appearance of any category, manufacturer, or product page
CMS Topics
Breadcrumb trail for easy site navigation
“Store is closed” feature
QuickBooks integration
Google AdSense integration

Additional shipping charges by product
Specify all orders as free shipping
Admin defined shipping methods (e.g. Ground, Next Day, 2nd Day, etc)
Calculate shipping by order weight
Calculate shipping by country & total order weight
Several Shipping Rate Computation Methods used Simultaneously (such as, FedEx and UPS)

Allow store owner to specify whether shipping is taxable
The European Union Value Added Tax (EU VAT) support (Company VAT Number)
Allow store owner to specify which tax based on: billing/shipping/default/shipping origin address
Allow store owner to specify whether prices include tax
Allow customer to choose tax display type (incl/excl tax)

Allow store owner to specify tax display type (incl/excl tax)
Allow store owner to specify whether shipping prices include tax
Allow store owner to specify whether to hide zero tax
Allow store owner to specify whether to hide tax in order summary when prices are shown tax inclusive

Store can be set to authorize only, or auth-capture credit card mode. You can then capture payment at shipment if desired
Void support
Real-time or offline credit card processing
Refund (and partial refund) support

Manual gateway (just collects order & payment information for offline processing)
Purchase order
PCI DSS compliant
Accept all major credit and debit cards