Vectr - Free vector graphics editor. A simple yet powerful web and desktop cross-platform tool for everyone.
Humaaans - Mix-&-match illustrations of humans with a design library.
Vecteezy Editor - Free Online Vector Editor - Design and customize SVG illustrations and graphics quickly and easily in your browser.
DrawKit - MIT licensed SVG illustrations, in 2 styles
Inkscape - Inkscape is a free, open source professional vector graphics editor for Windows, Mac OS X and Linux.
Handsome Illustrations - Create unique illustrations for websites & applications.