Blender is the free and open-source 3D creation suite. It supports the entirety of the 3D pipeline—modeling, rigging, animation, simulation, rendering, compositing, video editing, and motion tracking.
MODO is a fully featured 3D content creation application, famous primarily for it's modelling capabilities, MODO also offers a fast renderer, sculpting, painting, dynamics and animation tools.
3D-Coat is the one application that has all the tools you need to take your 3D idea from a block of digital clay all the way to a production ready, fully textured organic or hard surface model.
picoCAD is a program to build and texture lowpoly 3D models. Programs for modelling are overly complicated, picoCAD aims to make it fun, easy, and accessible by focusing on the bare essentials. This program was made using pico 8.
Autodesk Mudbox digital sculpting and texture painting software offers 3D modeling professionals the ability to quickly and easily create highly detailed organic and inorganic 3D assets.