CRM 2011/2013 Development Toolkit

http://msdn.microsoft.com/en-us/library/hh372957%28v=crm.6%29.aspx

With the Developer Toolkit, you can do the following:

• Easily generate strongly typed proxy classes without having to run CrmSvcUtil.exe.
• Generate plug-in code so you can immediately begin to write code for business logic.
• Edit and register plug-ins without using the Plug-in registration tool.
• Create new web resources or extract existing web resources, add them to your solution, edit them, and deploy changes all within Visual Studio.
• Create and edit workflow and dialog processes from within Visual Studio.
• Get easy access to entity and option set definitions, security role and field security profile information in Visual Studio.

Download SDK http://www.microsoft.com/en-us/download/details.aspx?id=40321