Here’s a list of 22 open source ecommerce solutions. Most of them use PHP coding and MySQL database.
(Clicking on links will open a new window)
Agora Cart
Cart Store
Chromium Cart
Cube Cart
Danto Cart
Dash Commerce
DigiStore.co.nz
eClime
eShop (WordPress)
Fish Cart
Magento Commerce
NopCommerce (ASP.NET)
Open Cart
Open Freeway
OsCommerce
OsCss
PrestaShop
Tomato Cart
Uber Cart (Drupal)
Virtue Mart (Joomla)
X-Cart
Zen-Cart
These were the only ones that I was aware of at the time of this posting. If you know of any other ecommerce solutions that are worthy of mention, please let me know.
Additions:
Batavi
Lite Commerce
Shopizer (Java)
nopCommerce is an ASP.NET-based