These are all my own concepts, and I am also modeling and texturing them for our final project.  Our programmers have done a fantastic job of optimizing, so we do not have to stay at extremely low poly counts.
The ship texture is not quite finished yet, but the render is the newest version.  The model is 1398 tris.  Shown with diffuse & lights, no other maps. 
The vending machine is 378 tris, and the texture is very unfinished.  Shown is with diffuse only, no lights, incandescence, normal, or spec.
The flower is 822 tris, very close to being finished.  Shown also with diffuse only.  I made it so detailed because it is supposed to be about three quarters of the player's height.
The lizard-frog is 690 tris, also near finished.  Shown also with diffuse only. 
The jackalope is 542 tris.  Shown also with diffuse only.  I deviated from the original idea to give the animal more interest, and a more exotic feel.  I took inspiration from the shown frilled lizard for the final colors and pattern.