I missed the old Mac calculator desk accessory so much I wrote a new version of it for current Macs (you can buy it if you want at CalculatorDA.com but I wrote it for my own nostalgia purposes and use it every day). Like the version Chris Espinosa handed to Steve Jobs it has lots of options for changing the look, but they are all modern choices, like jaggy versus anti-aliased, modern traffic light window controls vs old school close box, etc. I change up the settings depending on my mood.