When you think of slicers for FDM 3D printing — especially free slicers — you probably think of Cura, Slic3r, or PrusaSlicer. There are fans of MatterControl and many people pay for Simplify3D.
Using the template code of the G-code post-processing article last week, I put together a little script that lets you generate non-planar G-code on the fly using Slic3r. You can obtain the script ...