For whatever reason I got the urge to design some OpenROV themed keychain trinkets.
One trinket is the ROV itself and the other is a little diver dude. I have published the source and .stl files on Thiniverse, http://www.thingiverse.com/thing:120663 .
I used the free version of Sketchup to design the models. The rov model is pretty rough, I just eyeballed the dimensions from my previous more accurate design, http://www.thingiverse.com/thing:28277 .