I was wondering if there's a utility out there that would hide everything except the frontmost application. In other words, if I have several apps open, each with open windows, as I switch from one app to the other everything else gets hidden automatically, like hitting command-option-H. This used to be built-in to OS9 and earlier, and I've been using a utility called MenuStrip in OSX 10.4x, but it's PPC only. I've tried searching, but haven't found anything. Does something like this exist for Leopard?