Taking Finite Element Analysis this term which would be way easier if I actually had ever taken a basic course in mechanical engineering. Beams, trusses, springs, cantilevers are all foreign to me, I was learning about resistors and capacitors when the MechEs were learning this stuff.
Web to the rescue:
* Cantilever calculator up at efunda.
* Moments of Inertia and other basics for beams of any shape
* A ton of other basic calculations up here as well: efunda engineering calculations
* Of course Wolfram Alpha has a wealth of info as well.
Just starting to look thru iphone and ipad apps as well. Wolfram ALpha I already have, there are several civil enginnering apps as well — Statics, Civil Engineering Calculations. May try some of them.