Is there any sort of Remote Desktop Application available any would recommend? I have a friend who needs help with her mac and I want to help her but I don't know any kind of app I could use to view her desktop. I know ALONG time ago when I was using Windows there was some sort of Remote Desktop client that would let me do that and also take control of their desktop as well, which I'm looking to do in Mac OS X. She's running 10.4 and I'm running 10.6 (not sure if that matters. Is there any such app I could use in Skype? or just any app in general would be fine.