Script Software makes a couple of utilities that make my Mac work better for me. iWatermark for Mac OS X allows me to watermark images singly or in batches and with great ease. I don’t always watermark my photos, but when I do, this is what I use.
Running all the time though is iClock for Mac OS X:
See the time and date simultaneously in any format or color. Click on it to see a drop down menu of the current time/date in any city in the world or option click to see your updated portfolio of stocks. Use the lightning quick calendar, stop watch, calculator and timers (that can be set with one click).
I don’t use all the features of iClock by any means, but being able to format the date and time (separately) is very nice and I’m surprised by how often I want to check the time in some other part of the world or to set a quick countdown alarm.