Wallcat - Enjoy a new, beautiful wallpaper, every day.
Pattern Collect - Curated gallery of patterns by awesome designers
Splashify - Beautiful desktop wallpapers for Mac and Windows
Hero Patterns - A collection of repeatable SVG background patterns
Irvue - (previously Unsplash Wallpaper) Gorgeous wallpapers on your Mac.
Lagerraum.pro - Helps organizing and sharing your collections