Open Source C# Shopping Carts

nopCommerce is the best open-source eCommerce shopping cart solution. nopCommerce is free, and it is the most popular ASP.NET eCommerce platform. The product is being developed and supported by the professional team since 2008. nopCommerce has been downloaded more than 3,000,000 times. The active developer community has more than 250,000 members. nopCommerce runs on ASP.NET Core 5 with an MS SQL 2012 (or higher) backend database. nopCommerce is cross-platform, and you can run it on Windows, Linux, or Mac. nopCommerce supports Docker and MySQL out of the box, so you can easily run nopCommerce on a Linux machine. nopCommerce supports PostgreSQL database. nopCommerce fully supports web farms. You can read more about it here. All methods in nopCommerce are async. nopCommerce supports multi-factor authentication out of the box.

The project aims at building an ASP.NET application that offers support in the procurement process of small and medium enterprises. The solution is build in C# with ASP AJAX library.

GrandNode is one of a kind open-source e-commerce platform. Thanks to the most advanced ASP.NET Core framework and out of the box set of features, it makes a perfect fit for multiple e-business models. Meet the flexible, the most versatile open-source e-commerce platform on the market. Use GrandNode, ASP.Net Shopping Cart, and its ready-to-use integrations to sell everywhere with a single platform. GrandNode guarantees functionalities for now and for the future. We ensure both, the basic needs of each e-commerce, and future features needed for expansion. GrandNode is one platform that suits various business models. It can successfully empower traditional B2C & B2B stores, helping local brands expand globally. Our solution supports booking processes, facilitates the management of the availability calendar, and even enables the sale of online courses.

Multi-Level Marketing Software www.mandilabs.com

Smartstore is a free, open-source, full-featured e-commerce solution for companies of any size. It is web standards compliant and incorporates the newest Microsoft web technology stack. Smartstore includes all essential features to create multilingual and multi-currency stores targeting desktop or mobile devices and enabling SEO optimized rich product catalogs with support for an unlimited number of products and categories, variants, bundles, datasheets, ESD, discounts, coupons and many more. A comprehensive set of tools for CRM & CMS, sales, marketing, payment & shipping handling, etc. makes Smartstore a powerful all-in-one solution fulfilling all your needs. State of the art architecture thanks to ASP.NET 4.5, ASP.NET MVC 5, Entity Framework 6 and Domain Driven Design. Easy to extend and extremely flexible thanks to modular design. Highly scalable thanks to full page caching and web farm support.

iCart-Net is free and open source asp.net mvc shopping cart which uses sql server as database.