Inkscape

A set of extensions that allows export of paths to PCB layout editors, namely:

1) the pcb-rnd layout editor as a subcircuit in native pcb-rnd lihata file format (.lht)
( http://repo.hu/projects/pcb-rnd/ )

2) the gEDA PCB layout editor as a footprint in native gEDA PCB footprint format (.fp)
( http://pcb.geda-project.org/ )

3) KiCad users, indirectly, who can import gEDA PCB footprints from within KiCad

The export script for pcb-rnd will also export paths as polygons, along with the outlines, provided the paths depict simple, non self-intersecting polygons. The pcb-rnd layout editor has a more capable data model, allowing polygons within footprints, and also load and save in KiCad formats.