Download RevitAddinWizard/RevitAddinCoder/RevitAddinWidget 

More API wizards at http://spiderinnet.typepad.com/blog/2011/05/revit-addin-wizardscoders-and-revit-api-widgets.html

via
RevitAddinWizard Build 0.9.2.1 Been Rolled Out – RevitAddinWizard & More

Read about similar at:
http://thebuildingcoder.typepad.com/blog/2012/04/add-in-wizard-for-revit-2013.html