VirtueMart is an Open Source E-Commerce solution to be used with Joomla! (and Mambo).
Features include:
- 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)
A more extensive list of features regarding catalog, payment processing, security and more can be found here.
There is also an online DEMO.