Humaaans - Mix-&-match illustrations of humans with a design library.
Invision - Prototyping and collaboration for design teams
DrawKit - MIT licensed SVG illustrations, in 2 styles
Mockuuups Studio - Fast and easy way to create product mockups on macOS, Windows and Linux.
Handsome Illustrations - Create unique illustrations for websites & applications.
Craftwork - A collection of User Interface resources made by Craftwork