The Pencil tool draws lines, and the eraser removes them. The shapes tool allows you to use a paint bucket, rectangle, line and circle tools. Two finger drag and zoom anywhere to navigate large images. There's a full undo/redo stack, as well as a color picker with history, hsv, rgb, and hex! The canvas can be resized when a new canvas is chosen. The artwork is licensed under CC-BY-NC while the source code is under BSD-3-Clause license.