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DevLib is a highly reusable collection of components and core functionalities addressing common crosscutting concerns.

DinnerNow is a fictitious marketplace where customers can order food from local restaurants for delivery to their home or office. This sample application is designed to demonstrate how you can develop a connected application using several new Microsoft technologies, including: II

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Laharsub makes it easy for web applications to organize internet scale message exchange using a publish/subscribe pattern. AJAX or RIA applications running in a browser can create topics, publish, and subscribe to messages in a topic using REST APIs exposed by a .NET WCF service.

Soby web components provides set of libraries to make developers life easy. It integrates number of data services (SP, WS etc) with its existing components.

Xenta is an extensible enterprise n-tier application framework with multilayered architecture. It is an open source project and available for free. Developed in .NET/C# programming language. Initially targeted to web based solutions. Licensed under the MIT license.