Yesterday we released the Office Developer Tools for Visual Studio 2012.
The Office Developer Tools for Visual Studio 2012 provide broad and deep support, ranging from new templates to new designers to a whole host of integrated lifecycle tools. They enable developers to create, edit, test, debug, package, and deploy apps for Office and SharePoint, across all current Office and SharePoint hosting models and app types. In addition, beyond supporting a new application model based on web technologies, these tools also provide full support both for VSTO Add-ins and SharePoint Solutions.
Read more on the official blog post from S. Somasegar, Corporate Vice President of the Developer Division at Microsoft: