Excalidraw - Excalidraw is a whiteboard tool that lets you easily sketch diagrams that have a hand-drawn feel to them.
Figma - Team-based interface design, Figma lets you collaborate on designs in real time.
Sketch Toy - A drawing application that lets you save and share replays of your work with friends.
Invision - Prototyping and collaboration for design teams
Sketcharama - Draw a given word and let the other players guess your sketch.
Sketch - Professional digital design for Mac.