John's Background Switcher - Switch backgrounds to trending imgur, reddit, tumblr threads
UserGuiding - Create in-app experiences with the most straightforward product adoption platform — quick implementation, lasting user engagement.
Wallcat - Enjoy a new, beautiful wallpaper, every day.
Usetiful - Fight user churn with great user onboarding. Interactive product tours and smart tips significantly improve your user retention.
Splashy - Breathtaking, auto changing wallpaper app for macOS, Windows, Linux, iOS & Android
Userlane - Digital adoption platform with interactive guidance for software applications allowing anyone to understand and master any software from the get-go.