Company Imagine Apps Ltd created these great apps:
Coloring Book for Adults - Stress Relieving Art Therapy by Color Diary, ColorRing: Free Adult Coloring Book - Best Art Therapy to Relieve Stress and Balance Your Life, Fashion Coloring Book for Adults: Stress Relieving Color Therapy - Free Fun Girls Colouring Games, Free Fun Adult Coloring Book - FOOD: Coloring Book for Adults & Stress Relieving Color Therapy, and others..