Inkscape - Inkscape is a free, open source professional vector graphics editor for Windows, Mac OS X and Linux.
Sumatra PDF - Sumatra PDF is a slim PDF/DjVu/EPUB/XPS/CHM/CBR/CBZ/MOBI viewer for Windows.
Blender - Blender is the open source, cross platform suite of tools for 3D creation.
Foxit Reader - Foxit Reader is a free and light-weight multi-platform PDF document viewer.
Cinema 4D - Cinema 4D is a 3D modeling, animation, motion graphics and rendering application.
Adobe Acrobat DC - Make your job easier with Adobe Acrobat DC, the trusted PDF creator. Use Acrobat to convert, edit and sign PDF files at your desk or on the go.