Okular - Okular is a universal document viewer based developed by KDE.
Blender - Blender is the open source, cross platform suite of tools for 3D creation.
Sumatra PDF - Sumatra PDF is a slim PDF/DjVu/EPUB/XPS/CHM/CBR/CBZ/MOBI viewer for Windows.
Autodesk 3DS Max - 3ds Max is software for 3D modeling, animation, rendering, and visualization. Create stunning game enrivonments, design visualizations, and virtual reality experiences.
Foxit Reader - Foxit Reader is a free and light-weight multi-platform PDF document viewer.
ZBrush - ZBrush is a digital sculpting and painting software solution.