Adyen

The official Adyen Payment API Library for .NET

GrandNode

Headless, multi-vendor, multi-tenant, the most advanced open source e-commerce platform based on .NET Core 5.0 and MongoDB.

SimplCommerce

Super simple ecommerce system built on .NET Core. Simple to use and easy to customize. Thanks to .NET Core, you can run the SimplCommerce on Windows, Linux. With various RDBMS: Microsoft SQL Server, PostgreSQL, MySQL

Virto Commerce

Virto Commerce is the second generation release and is the only enterprise level e-commerce product fully available under Open Source license. Virto Commerce is based on .NET 4.5 with extensive use of MVC, IoC, EF, Azure, AngularJS and many other cutting edge technologies. It can be deployed in Microsoft Cloud (Azure), Amazon Web Services (AWS) and on-premise. https://virtocommerce.com

Stripe.Net

Stripe.net is a full service .NET API for https://stripe.com/

SmartStoreNET

Free ASP.NET Core MVC e-commerce Shopping Cart Solution

ServiceStack.Stripe

Typed .NET clients for stripe.com REST APIs

NopCommerce

nopCommerce. Free open-source e-commerce shopping cart (ASP.NET Core)