Where can I find makecert.exe? Visual Studio Ultimate 2012
Found it: C:\Program Files (x86)\Windows Kits\8.0\bin\x64
or for Visual Studio 2013: C:\Program Files (x86)\Windows Kits\8.1\bin\x64
Can't find it on my 2012 or 2013 versions, but 2008 has it under
\Program Files\Microsoft Visual Studio 8\SmartDevices\SDK\SDKTools
\Program Files\Microsoft Visual Studio 8\SDK\v2.0\Bin
\Program Files\Microsoft Visual Studio 8\Common7\Tools\Bin
Guessing it was removed?
Makecert has been deprecated, you can find a PowerShell script that does the same on TechNet: https://gallery.technet.microsoft.com/scriptcenter/Self-signed-certificate-5920a7c6