Vectr - Free vector graphics editor. A simple yet powerful web and desktop cross-platform tool for everyone.
Open Peeps - A hand-drawn illustration library.
Vecteezy Editor - Free Online Vector Editor - Design and customize SVG illustrations and graphics quickly and easily in your browser.
Control Illustrations - 108 free flat illustrations with customizable characters
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.