Alternatives to popular expensive software

Adobe Illustrator
Alternative: Inkscape (https://inkscape.org/)
Inkscape is a free and open source vector editor using Scalable Vector Graphics (SVG) as the native format. It’s lightweight, so will run on quite low-powered computers, but it’s surprisingly capable for a free tool, with a lot of useful features including layers, object grouping, drawing, shape, calligraphy, pencil and pen tools, path simplification with variable threshold, bitmap tracing and Boolean operations.