Excalidraw - Excalidraw is a whiteboard tool that lets you easily sketch diagrams that have a hand-drawn feel to them.
Pocket Trains - Pocket Trains is Single-player Business Simulation developed and published by NimbleBit.
Sketcharama - Draw a given word and let the other players guess your sketch.
TransPlan - TransPlan is a Strategy, Physics-based Puzzle and Single-player video game developed and published by Kittehface Software.
Sketch Toy - A drawing application that lets you save and share replays of your work with friends.
Epic Draw: Physics Puzzle - Epic Draw: Physics Puzzle is a Physics-based, Puzzle and Education video game created and published by FreneticGamez.