EtaPRO Technical Support. EtaPRO System Administrators can download Software and Documentation Updates through this site. With a current Performance Plus+ Support Agreement, you can access the latest software, documentation, support articles, and keep track of any open issues on your system. For more information, see the Registered User Area or contact us.
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Below is the list of popular 3D software, free or paid 3D software. Most of 3D printers require that you use 3D computer graphics software that saves objects in the STL(stereolithography) format. Free 3D softwares: 1  Google SketchUp-This Google SketchUp is fun and free, and is known for being easy to use.2  To build models in SketchUp, you draw edges and faces using a few simple tools that you can learn in a short time. 3  With with Push/Pull tool you can extrude any flat surface into a 3D form.ree 3D softwares: 1  Google SketchUp-This Google SketchUp is fun and free, and is known for being easy to use. 2  To build models in SketchUp, you draw edges and faces using a few simple tools that you can learn in a short time. 3  With with Push/Pull tool you can extrude any flat surface into a 3D form.