In addition to Blender there is MakeHuman: http://www.makehuman.org/

Pixar also open sourced OpenSubDiv: https://github.com/PixarAnimationStudios/OpenSubdiv

They also offer a commercial and non-commercial versions of RenderMan: https://renderman.pixar.com/view/renderman

For the purely commercial side, Maya from Autodesk works wonderfully on Linux: http://www.autodesk.com/products/maya/overview

There is also Katana (commercial license only) from The Foundry: https://www.thefoundry.co.uk/products/katana/

For 3D CAD modeling rather than the artistic style modeling, there is OpenSCAD: http://www.openscad.org/

For 2D animation (cartoons and anime) there is OpenToonz, from Studio Ghibli: https://github.com/opentoonz/opentoonz (The main OpenToonz website lists it for Windows and Mac only, but the Github repo has Linux build instructions.)