90% of the work done was in Inkscape and the effects where done with GIMP.
Website: https://theouterlinux.gitlab.io
All of this was done with Inkscape
This monochromatic blue color that I see in many inside covers of manga was done with GIMP.
The page-curling was done with GIMP.
This was sketched with GIMP and then I later added it to Inkscape for line correction but ended up also coloring it in Inkscape.