Pix2pix - Turn your terrible doodles into cats and other things ✏️😸
noise.sh - Excel for music producers and sound designers
SketchDaily.io - Free educational tool for improving your sketching skills.
Composer's Sketchpad - A doodle-y iPad sequencer for making quick musical sketches
Drawzee - Change your sketches into cats 🐱, dogs 🐶 or other animals 🐍
Helio - Design successful products by revealing key user behaviors