Voxly - Voxly – Color by Number 3D is a relaxing, de-stressing, and addictive coloring app designed for kids and adults who love to color.
Learn Anything - Search Interactive Maps to Learn Anything
Daily Pixel - Daily Pixel – Color by Number, Happy Pixel Art developed and published by Magic Arts.
Mindspace - Free learning platform with quick and simple crash courses.
Colorfit - Colorfit: Garden Coloring Book is a perfect coloring app for adults that offer a real coloring experience.
Knudge.me - Notification based micro learning platform