Open Peeps - A hand-drawn illustration library.
Source Wireframe Kit - Library of 537 blocks for desktop and mobile prototyping
Control Illustrations - 108 free flat illustrations with customizable characters
Contra Wireframe Kit - Open source wireframe kit for design and prototyping 🚀
Craftwork - A collection of User Interface resources made by Craftwork
Platforma - Wireframe library of layouts and UI elements