vpype
Assuming you have python3 and pip3 installed, you should be able to run:
pip install "vpype[all]"
vpype read input.svg write --device hp7475a --page-size letter --landscape output.hpgl
vpype read input.svg linesimplify reloop linemerge linesort write --device hp7475a --page-size letter --landscape output.hpgl
https://github.com/plottertools/hatched
pip install hatched
vpype hatched --levels 25 128 220 -s 0.5 -p 4 data/jpeg/lucia.jpeg layout a4 write data/hatched/lucia.svg
https://github.com/serycjon/vpype-flow-imager
vpype
Assuming you have python3 and pip3 installed, you should be able to run:
pip install "vpype[all]"