[Al Skierkiewicz]

I was searching around for apps for my new Android phone and came across Electrodroid. Not only does it have a variety of handy dandy calculators, you can also find pinouts for several types of connectors, and a long list of tables like wire gauge sizes, wire capacity and even a battery life calculator. If you have an Android, check it out.

Also RealCalc is a nice "free" scientific calculator.

Swiss Army Knife has several internal apps like stop watch, timer, ruler, and compass.