WallpapersCraft - HD & 4K wallpapers
Wallpaper Studio 10 - Wallpaper Studio 10: Total synchronization across your Android, Windows 10 and XBox devices
Wallpapers - Wallpapers is a leading personalization application by Google LLC that make the most of your display with beautiful wallpapers and advanced features.
Unsample - Download zipped sample photos from Unsplash with one click!
Moddy - Snap, modify and surprise! With Moddy the world is your playground!
The Unsplash API - No-limits, do-what-you-want API for access to 200K+ HD pics.