Open Source Solid Modeling CAD
BRL-CAD is a powerful cross-platform constructive solid geometry solid modeling system that includes an interactive geometry editor, ray-tracing for rendering & geometric analyses, network distributed framebuffer support, image & signal-processing tools.
The "Img" package adds a lot of image formats to Tcl/Tk.
A personal coder keys applied to developement nuk friendly for
File and folder renamer
Lets you rename in batch files or folders.