Saft is a tool that allows you to do a number of things in Safari for Mac OS X, but the one likely most often used is to run Safari as a Kiosk. Saft opens Safari, places its preferences into each users com.apple.Safari.plist (in ~/Library/Preferences) and then runs Safari with its own brand of fun. When used in conjunction with the Simple Finder, it’s a pretty powerful way to lock a system in such a way that only a key combination or two can be used to unlock it. Saft can also block adds using regular expressions, provide shortcuts that allow you to invoke sites with a keystroke and perform…