Wallcat - Enjoy a new, beautiful wallpaper, every day.
Design Principles - An open source repository of design principles and methods
Splashify - Beautiful desktop wallpapers for Mac and Windows
UX Research Field Guide - Your map to the world of UX research 🌏🕵️♀️
Irvue - (previously Unsplash Wallpaper) Gorgeous wallpapers on your Mac.
Business-Driven Digital Product Design - A guide on how to create influential user experience