ReSharper

ReSharper is the leading Visual Studio productivity tool for .NET developers, which fully integrates with Microsoft Visual Studio 2005, 2008, 2010 and 2012. It helps developers create and improve code in C#, VB.NET, ASP.NET, ASP.NET MVC, JavaScript, CSS, HTML, XML, and XAML. ReSharper makes thousands of .NET developers worldwide more productive by providing code inspections, code refactoring, blazing fast navigation, and coding assistance.