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.
Thanks Al.
I’m getting a new android phone this weekend and I’ll have to check those apps out.
FRC Spyder is the BEST FIRST app you can find on the android market, hand down 
Usually if you open the default calculator app on your phone and turn it to the landscape orientation it will turn into a scientific calculator.
It should be, it was written by one of software mentors.
I really like ANDY-86 which is a TI-86 emulator that seems to be accurrate to the actual model. Another useful tool has been the “flash-light” app that turns my flash into an very bright flash.
There is also Arity calculator.
It is a nice, and free symbolic calculator.
It can do graphs of 1 and 2 variable functions.
Useful for visualizing multi-variable functions in Calc3.
(the 2 variable 3d graphs are very neat to see, it can do real-time rotation and zooming)
I’m working on a android app to control the robot. I’ll post it as soon as I get it working.
Can we get the “Inspection checklist” as an app?
You always give me the hard questions! Actually, I have a pdf viewer and also found an Autocad Viewer but I haven’t used it yet. I have found another cool app called, CamScanner that is supposed to use the camera and turn a picture into a pdf doc. I haven’t used that one either.
A couple I have used and found useful during build season is the “Bubble level”. (It’s actually pretty accurate.) “WiFi analyzer” and the “Android Lightsaber” are must haves also.