Free merchant works with these free open source shopping carts.
- osCommerce
- Zen Cart
- AsecureCart
- AmpleCom
- Comersus
- X-authorize.com
- 1ShoppingCart.com
- CartManager
- DesignCart
- ProductCart/Early Impact
- Fortune3
- AppleCart
- VeraCart
- ShopSite
- BV Commerce
- Ashop Commerce