Some companies that offer free three-dimensional design software include Pixologic and Trimble Navigation. Both companies enable online users to download these applications from their websites.
Pixologic is the developer of the 3-D digital sculpting program Sculptris, which is compatible with Mac OSX and Windows-based operating systems. This user-friendly application caters to all types of artists, even to those without prior experience in digital art making. The company provides an introductory video on its website for users who are interested in trying Sculptris.
Trimble Navigation offers its 3-D modeling software SketchUp, which can be downloaded at no cost from SketchUp.com. This application features a 3D Warehouse where users can find an extensive collection of free 3-D models. Additionally, users can fully customize SketchUp based on their preferences. The program includes an Extension Warehouse, that includes add-on tools for drawing 3-D moldings and for rendering project elements.
Autodesk also provides users with free trial versions of some of the company's 3-D design software, which can be downloaded from its official website. These applications include AutoCAD, Fusion 360, Inventor, Revit, 3Ds Max Design, InfraWorks and SketchBook Pro. It should be noted that proper usage of these free proprietary products is observed as each product comes with a set of terms and conditions stated in the end-user license and services agreement.