Inkspot (vector)
...which is why I'm unlikely to upgrade from my ancient PS. It does the job, so stick with what you know: they're all hugely capable. Unless you're still on MS Paint!
You mean Inkscape, right?
My go-to tool for everything that might require vectors. A bit clumsy to use, but gets the job done.
I've been using Jasc (now Corel) PaintShop Pro 7 ever since I got into painting and detailing planes in 2004. It's a good program but... it won't open Adobe PhotoShop .psd files which seem to be the standard file format for most airplanes' paint kits nowadays. .......