xmllint - command line XML tool
Blender - Blender is the open source, cross platform suite of tools for 3D creation.
GCC C Preprocessor (cpp) - Top (The C Preprocessor)
Autodesk 3DS Max - 3ds Max is software for 3D modeling, animation, rendering, and visualization. Create stunning game enrivonments, design visualizations, and virtual reality experiences.
PP - A generic Preprocessor - P is a text preprocessor designed for Pandoc (and more generally Markdown and reStructuredText).
Cinema 4D - Cinema 4D is a 3D modeling, animation, motion graphics and rendering application.