Inkscape is a free vector graphics program supporting many standard formats.
An excellent alternative to Adobe Illustrator and CorelDraw, Inkscape is a free vector graphics program supporting standard SVG format, as well as XML and CSS standards. This program can do everything you’ll need in a vector graphics program – tracing, path operations, direct XML editing, etc.
For the average teacher creating graphics for a Moodle course, to brighten up a SCORM package, or inclusion in a H5P object, import and export formats include all the common image types, including JPEG and PNG.
There is a definite learning curve for anyone with Inkscape (unless you are already familiar with systems like Adobe Illustrator). But there are some great tutorials: https://inkscape.org/learn/tutorials/
Inkscape is available for Windows, macOS, and Linux. It’s free and open source. But for many teachers creating online courses the need to create vector graphics is limited. However, for those designers and content creators who are working in a more corporate environment, developing some beautiful graphics for courses may be a necessity.
Find out more at https://inkscape.org