I have Xamarin installed on the Visual Studio 2013 on Windows Operating System. It works fine.
There is Xamarin tools in VS2013 as follows:
My problem
First try to uninstall all the other versions of Visual Studio (VS) 2013 in this case. Then try to reinstall Xamarin.
I recently had horrendous problems trying to install Xamarin on VS2015 + Win10. (I don't have any other VS versions installed.) Even a full install and reinstall left huge holes in the installation. I tried repeatedly and each time the whole dev environment seemed to get itself in a different unusable state.
The fix for me, which is probably hitting a nut with a sledgehammer, was to:
This resulted in a faultless, fully functioning Xamarin environment for me. Overkill, maybe, but worth a go if all else fails.
We have a few troubleshooting steps on our Knowledge Base that you can find here:
https://kb.xamarin.com/customer/en/portal/articles/1643349-missing-visual-studio-extensions-after-installation
Note: Some of these steps have older versions listed in the respective paths. You should use the latest version number available.
This is strange, I did not have any problem with Xamarin & VS 2015 (community).
You said,
I will see the Xamarin in it
Did you try to create a project or/and add your account in the new VS Installation ?