On average most 405th members aren't really going to be 3d modelers.
But it is easy to have a small list of programs.
Blender is pretty easy to access since it is free but the learning curve can be a bit difficult.
SketchUp is another "free" application for 3D modeling even though it is web-based now.
And meshMixer is another program that I see in the modeling circles.
Outside of 3D modeling, there are a host of assisting programs for 3D printing, 3D unfolding, or just viewing 3D models.