Wallcat - Enjoy a new, beautiful wallpaper, every day.
Iceberger - Draw an iceberg and see how it will float
Splashify - Beautiful desktop wallpapers for Mac and Windows
Stickman Builder - Free parametric graphic Stickman Builder, creates fascinating stick figures on the fly.
Irvue - (previously Unsplash Wallpaper) Gorgeous wallpapers on your Mac.
Drawy - Learn to draw, use camera to score your drawings