Ouch! offers free vector illustrations for user interface, created by Icons8. These illustrations give a clean, trendy look to your designs.
10+ Free absurd illustrations that make sense in .png format. Take every user on an individual journey through their own imagination.
DrawKit is a collection of free, beautiful, customisable MIT licensed SVG illustrations in two styles, to use on your next website, app, or project.
Many Pixels offer royalty-free and customizable SVG illustrations, every week, to power up your projects.