Wallcat - Enjoy a new, beautiful wallpaper, every day.
ChalkMotion - Create animated doodle slideshows
Splashify - Beautiful desktop wallpapers for Mac and Windows
Drawy - Learn to draw, use camera to score your drawings
Irvue - (previously Unsplash Wallpaper) Gorgeous wallpapers on your Mac.
The Bored Hoard - Sieve the web for cool websites you probably never knew existed. Supporting the smaller independent sites that Google ignores. All revealed in a weekly box delivered online every Friday.