Microsoft Visual Studio
A quick look: Visual Studio 2010 Pro is integrated development
environment (IDE) product for software developers.
Microsoft® Visual Studio 2010 Professional is the essential
tool for individuals performing basic development tasks. It simplifies the
creation, debugging, and deployment of applications on a variety of platforms
including SharePoint and the Cloud. Visual Studio 2010 Professional comes with
integrated support for test-driven development, as well as debugging tools that
help ensure high-quality solutions. New drag-and-drop data binding in Windows
Presentation Foundation (WPF) and Silverlight designers make building Windows
and rich internet apps easy and fast, for both designers and developers. MSDN is
not included with this promotional package.