Free 3D Modeling Programs
SketchUp Free is one of the most popular free online 3D modeling software programs out there. It is quite easy and many people use it for modifying their 3D objects. You can edit your 3D design online and have SketchUp projects with you wherever you go.
Blender is a free open source 3D creation suite. It allows you to model, animate, simulate and render 3D projects. Composition and motion tracking, video editing and game creation are also possible using Blender. We consider Blender to be the most advanced free 3D modeling app available, and we sure recommend it!
Autodesk Meshmixer is free software for working with triangle meshes. It is not possible to create 3D models from scratch, but you can import your 3D models for further editing. The following file formats can be imported into Meshmixer: STL, OBJ, AMF, PLY, OFF, 3MF and MIX. The app is available for Windows 7 or later.
We believe that free 3D modeling programs will be enough, but you can go further and have a look at the following paid apps as well: