Can i download a torque demo?

#1 You can download the Realm Wars demo, thats a work in progress being built by members of the community using the Torque engine.

Other than that you could try downloading the demos of Dogs of Prey or Trakers, both games being developed using Torque and looking pretty good :) There isn't a Torque demo as such other than those as far as I know.

#2 Also try the Orbz and Marble-Blast Demo.
Both are Games developed with the TGE!

#3 Oh, i know you can do editing with tribes2 (made with torque), so check your coasters. :)