Picular - Google, but for colors.
Humaaans - Mix-&-match illustrations of humans with a design library.
Get waves - A simple web app to generate svg waves, unique every time
Control Illustrations - 108 free flat illustrations with customizable characters
Color Palette Generator - Enter the URL of an image and find its color palette
Ouch! Illustrations by Icons8 - Professional, perfectly matching, and customizable illustrations for any designs