Hellborn, Given the tools that you're comfortable with, I'd recommend Java since those apps are a little kinder to downloaders, but there's nothing wrong with TCL/TK if you want to go that route... Depending on how complex the utility or app you're planning to write is, if decide to use VisualBasic and are willing to share source code, one of us "hybrid" MAC/PC Heads can generate a MAC version if demand is great enough... For my part, I'm just grateful that you're willing to be nice to PC users as well as MAC users by developing something to share with us...Ain't gonna quibble with you about how you go about it...