Windows equivalent : 3D Studio MAX
Ubuntu equivalent : Blender
Blender is a professional-level 3D-modelling application, capable of helping you to produce photo-realistic results.
It has many advanced features, and can handle the animation, rendering, post-production and interactive playback of your models.
Blenderâ€™s features include 3D modeling, UV unwrapping, texturing, rigging, water and smoke simulations, skinning, animating, rendering, particle and other simulations, video editing software, compositing, and the ability to create interactive 3D applications, video games, animatedÂ film, or visual effects.
More advanced tools include rigid, realistic body, fluid, cloth and softbody dynamics simulation, modifier-based modeling, character animation, a node-based material and compositing system, and embedded scripting in Python.
sudo apt-get install blender
Or you can get the latest developmental beta version:
sudo add-apt-repository ppa:irie/blender
sudo apt-get update && sudo apt-get install blender2.5