Sculptris - Sculptris: Enter a world of digital art without barriers.
Microsoft 3D Builder - View, capture, personalize, and print 3D models.
Misfit Model 3D - Misfit Model 3D is a 3D model editor that basically operates with triangle-based models.
Infurnia Architecture Design - Infurnia is a powerful, multi-featured cloud-native Architecture solution that you can use to introduce BIM in your Designs, partner up with others using functions, and take care of the data in an effective way.
ShapeShop - ShapeShop is an advanced and professional 3D design and modeling application that comes with an easy-to-use and user-friendly interface.
Blender - Blender is the open source, cross platform suite of tools for 3D creation.