Daily Pixel - Daily Pixel – Color by Number, Happy Pixel Art developed and published by Magic Arts.
Tux Paint - Tux Paint is a free, award-winning drawing program for children ages 3 to 12 (for example, preschool and K-6).
Coloring Book for Adults - Coloring Book for Adults is a 100% free coloring app that offers an addictive way to de-stress and get creative.
Lil' Picasso - Lil Picasso is a coloring and creativity package for children.
Adult Coloring Book - Free Pictures, Best Zoom, Most Color, New Tools, and No Subscription fee.
Painty - Kid, if you have a dream to paint the best picture in the whole world, this is the place to start...