Recently Apple released the Gold Master of Mountain Lion. Those of us with Developer access may have been fortunate (ready silly) enough to download it and start to play with it. As far as I know everyone that does this installs on a brand now test system so that they can find all of the things that change, before they start work on their production machine (ahem!).
So, if, like me, you have found yourself upgrading this post might help you shortcut some of the things that took me a while. My developer life uses the following tools regularly: