Inkscape is a cross-platform vector image editor available for GNU/Linux, macOS, Windows and more operating systems.
Inkscape is free software and is the recommended way to edit SVG images for Unvanquished.
The Inkscape website is inkscape.org.
The Inkscape wiki is wiki.inkscape.org.
The Inkscape documentation can be found on inkscape.org/learn.
The Inkscape source repository is gitlab.com/inkscape/inkscape.