You can write your own plugins¹ for Inkscape as well. Last year I've had a lot of fun writing a plugin that skews, scales, and rotates objects in Inkscape to create (simple) drawings in the isometric perspective² — have a look at the write-up if you want to find out about basic linear algebraic SVG transformations in Inkscape. SVG is extremely well-suited for such tasks.

1: https://inkscape.org/en/gallery/%3Dextension/

2: http://jeroenhoek.nl/articles/svg-and-isometric-projection.h...