SketchDaily.io - Free educational tool for improving your sketching skills.
Cool Art Drawing Ideas - Cool Art Drawing Ideas is a free Art and Design app that helps you to draw cool and best pictures.
Pix2pix - Turn your terrible doodles into cats and other things ✏️😸
Pencil Sketch - Pencil Sketch developed and published by Dumpling Sandwich for Android and iOS devices.
Cartoonify - Turn a photo a cartoon drawing, using a neural network
Doodle.ai - Doodle.ai is a free iOS app that helps you to learn drawing with a number of advanced tools.