AnkhSvn is installed but not working in Visual Studio 2013

I have installed Visual studio 2013 , and I have installed AnkhSvn-2.5.12266.msi for svn, but this "Add-On" is not available in Visual Studio. Why?

It is there. Just change the source control options in visual studio to use Ankh instead of TFS.

Go to Tools/Options/Source Control/Plug-in Selection, select the AnkhSVN plug-in.

Then restart visual studio and you are good to go. Its working perfectly for me.

Or reinstall the complete ankhsvn client. As this guy here:

AnkhSVN settings menus not showing up in VS2012

To add to previous answer I'd like to set up WinMerge as external Diff and Merge Tools after setting the source control plug-in (you have to install WinMerge first):

Visual Studio -> TOOLS -> Options -> Expand the "Source Control" Node

Double click on the Pending Changes will show the change in WinMerge:

1. Go to Tools/Options
2. Select Source Control/Plug-in Selection
3. Under Current source control plug-in select AnkhSVN - SubVersion Support for Visual Studio