Open Doodles - A collection of free sketchy illustrations
Evie by unDraw - MIT licensed illustrations for your next project
DrawKit - MIT licensed SVG illustrations, in 2 styles
Humaaans - Mix-&-match illustrations of humans with a design library.
Illustrations.design - Beautiful, hand-crafted vector Illustrations for your next project
Stubborn Illustrations - 30 little exciting stories from the startup world