OpenToonz is a free and open-source animation software package developed and released by Studio Ghibli. It was originally based on the software used by Studio Ghibli for their productions, and has since been heavily modified and extended. It is designed to be used for both traditional and digital animation production. OpenToonz is capable of producing both 2D and 3D animations, and is suitable for both professional and amateur animators. OpenToonz provides a range of tools and features to aid in the animation process. These include an in-depth timeline, a powerful vector-based drawing tool, a brush-based coloring tool, a variety of effects and filters, and support for various output formats. It also supports scripting, allowing users to create custom scripts to automate tasks. OpenToonz is available for download on the official website, as well as on various platforms, including Windows, macOS, and Linux. It is free to use and requires no license key or subscription.
Discontinued Project updated here: http://alternativeapp.info/software/pencil2d/