Sitefinity CMS is a flexible ASP.NET-based content management platform that is used for the construction and management of commercial websites, community portals, intranets, and personal blogs. The product's architecture leverages the .NET development patterns including Master Pages, templates, user controls, themes and CSS.  Sitefinity CMS is engineered with flexibility and extensibility in mind to give developers the freedom they need to integrate legacy applications or use custom 3rd party controls and modules.  Telerik, the publisher of Sitefinity CMS, is a leading vendor of ASP.NET AJAX, Silverlight, WinForms and WPF controls and components, as well as .NET Reporting and .NET ORM solutions. Building on its solid expertise in interface development and Microsoft technologies, Telerik helps customers build applications with unparalleled richness, responsiveness and interactivity. 

BV Commerce Toolkit is an award winning shopping cart software for ASP.NET. It offers the latest ecommerce technology for shopping carts including URL Rewriting and AJAX at a value price.  The administrator web site that is included with BV Commerce Toolkit offers incredible control over store content. Manage page layouts, custom content and widgets without writing any code.  Developers have complete control over the appearance and functionality of stores built with BV Commerce Toolkit. Source code and Visual Studio project files are including helping you get up and running quickly.  It has an exclusive modular architecture that makes it easy for developers to add functionality without changing the core source code. Plug-ins make it possible to add features while still using standard service packs.