how is this free?!?!?!?!?

This is the most exciting engineering app Ive seen! Ive just started to play with it so Ive yet to really push the limits but from what Ive seen so far the UI is very intuitive. I love how you can model ontop of a picture.

Things it is missing that would be aswesome to add.

-cable / tension or compression only members
-springs
-deflections, including being able to apply your own forced deflection.
-and 3D of course. Space frames FTW!

In any rate you have a winner on your hands autodesk.

unTick about Autodesk ForceEffect