JR Screen Ruler (For Windows 95/98/2000/NT/ME/XP) I'm not sure if there's a native MAC version for the on-screen ruler - - doesn't appear to be. This is an old fashioned kind of tool, but still one of my favorites in my Designer Tool Kit.   Recently I lost the hard drive on my main workstation. So, it's taking some time to get the backups restored and everything back in place, especially my Desig…