With the new release of SharePoint 2013 Preview now seems like all SharePoint enthusiastic developers are spending a lot time on investigating the features and capabilities of new version. With the same interest I started to write some Apps for SharePoint 2013 but before start couldn’t find the correct templates in Visual Studio 2012 (RC). So this is how to enable those templates on VS 2012.
Navigate to Microsoft Office Apps web site (http://msdn.microsoft.com/en-US/office/apps/fp123627) and go to the Tools section and download the tools from there.
The direct link to download the tools pack is (http://go.microsoft.com/fwlink/?LinkID=257068)
After successful installation of the tool pack, you will see the new templates in VS 2012.
Happy Coding SharePoint 2013 
Kamil's Blog 
Reblogged this on Mostafa Absy.