My favorite has to be a CNC mill - I did the wings of team 1018.
But not everybody is so blessed to work for a machine tool manufacturer ...
Other than that - the calliper (spelling? I'm German, I'm allowed to screw that one up ;-), followed by the hammer (the big one)

My DMM

hmmmm... CNC mill or CNC lathe, not like i've used one, just watched. I like my mill tho, digital readout happiness. mmmm... i like my tapping :D (i'm kidding). oooh flame oxygen torch. :D

arc welder, you can melt metal, light fires, provide lighting, make huge plumes of smoke, and of course weld!

Hummm...I need to think ou of this one... I would think the welders and the mill....but those are machines.....but tools I would have to say the tap, I have this thing with tapping ....lol!!! wait!! wait!!! and Sharpie!!!! and of course duck tape and a hammer! :D

The lathe or the razor

Well for Powered tools I'm gonna have to go witht he team Sawz-all, It can cut through anything, as for my favorite tool, I'd have to go with a simple Straight Razor that folds out of a little key chain holder thingy.

Angle grinder.

Re: New tool
 

::continues staring in awe:: pretty...

lol, well, my other favorite tool is my leatherman...but thats mostly because I help SOAP at competition (those pesky computers always need a good inside lookin)

my favorite tool has become a 100 lb brass rod that we found in the back of the machine shop. great for relieving anger on the robot, bins, or freshmen. also great for when parts need the proper motivation to fit.

wait wait wait, we're not the only team with a 100 lb brass rod in teh machine shop (ours was in a drawer).

Quick OT question, but, does every team have a 100 lb brass rod in the machine shop?

CNC mill, definitally.

Greg

little big al and the 3/8 7/16 combo crescent wrench

My Leather man is definitely my favorite tool. However, I also have taken a liking to our 25 lb. steel straightening plate.

A good set of allen wrenches... They are invaluable to anyone on our team working on frame/drive.