OpenToonz is full-featured 2D animation software capable of producing everything from short commercials to feature films. Toonz, the closed-source predecessor of OpenToonz, was used in the production of a number of films, including Balto, Spirited Away, and Mary and the Witch's Flower. Further examples of work produced with the software can be found by clicking "Cases of Introduction" in the menu at the top of the page linked above. Animators can create frames directly in OpenToonz using a built-in digital painting interface. Alternatively, users can employ a scanning workflow to digitize hand-drawn frames. Frames can be assembled into a film using either an exposure sheet or a timeline interface. A "node tree" interface allows the insertion of transition effects between scenes. While much of the OpenToonz documentation is in Japanese, there are two English-language user forums linked from the page above: a "Google Group" for problem-solving and a GitHub "forum" for developers. The OpenToonz site provides installers for Windows and macOS computers. Some Linux and BSD systems also provide OpenToonz packages in their official repositories.