Particularmente, creo que el Expression Web es la mejor IDE para el desarrollo y diseño web.
Expression Web 3: Expression Web makes creating compliant standards-based Web sites faster and easier. With a state-of-the-art design surface that generates clean CSS, you can make design decisions on the fly, knowing that you’re seeing a faithful representation of the final browser-rendered page.
Expression Blend 3: Expression Blend is the tool for interaction design on the Silverlight and .NET platforms and enables user experience concepts to be delivered with full fidelity, from the initial prototype to the completed project.
SketchFlow 3:SketchFlow prototypes are fast, easy and inexpensive to build, making it possible to create, explore and compare multiple ideas before moving forward with a solution.
Expression Design 3: Expression Design is a professional design tool for creating graphics content that can be used within the authoring applications in Expression Studio: Expression Blend and Expression Web.
Expression Encoder 3: Expression Encoder 3 provides the power of industry leading encoding, in a simple approachable interface to make it easy to prepare video for use in a variety of ways, including Silverlight on the Web.