MDB for Angular - Material Design + Angular done right
Humaaans - Mix-&-match illustrations of humans with a design library.
Invision - Prototyping and collaboration for design teams
Control Illustrations - 108 free flat illustrations with customizable characters
Platforma for Android - The ultimate wireframe kit for your next android app
Ouch! Illustrations by Icons8 - Professional, perfectly matching, and customizable illustrations for any designs