Inkscape is a free and open-source vector graphics editor used to create vector images, primarily in Scalable Vector Graphics (SVG) format. Other formats can be imported and exported. Inkscape can render primitive vector shapes (e.g. rectangles, ellipses, polygons, arcs, spirals, stars, and 3D boxes) and text.
Inkscape offers a variety of tutorials on their website, they also have informational links to teach you about the tools and features Inkscape provides!