Augi

.NET Domain-Driven Design with C#: Problem-Design-Solution
51Degrees.mobi - Mobile Device Detection and Redirection
A Cloud Storage Programming Interface - Store everything
Agr.CQRS
Ajax.NET Professional
Altairis Mail Toolkit
Altairis Web Security Toolkit
Aquiles
ASP.NET
ASP.NET Design Patterns - ASP.NET MVC 2 Case Study Starter Kit
ASP.NET MVC / Web API / Web Pages
ASP.NET MVC 2 Knowledge Exchange inspired by StackOverflow
ASP.net MVC Awesome - jQuery Ajax Helpers
ASP.NET MVC SiteMap provider
Attribute Based Caching
AutoFixture
AutoMapper
Azure Membership, Role, Profile, and Session-State Providers
Blake.NUI
Boo syntax highlighting for Visual Studio 2010