Pencil2D is a free and open-source 2D animation software available for Windows, Mac OS, and Linux. You can download the latest version HERE.
Pencil2D uses a bitmap/vector drawing interface to produce simple 2D graphics as well as animation. Pencil is written in C++ and is Qt-based, as well as licensed under the GNU General Public License.
Originally created by Patrick Corrieri, as a simple “pencil test” program, it was extended afterwards mainly by Pascal Naidon until It was abandoned. Pencil2D is a collaborative effort initiated by Matt Chang and currently in development.
This website intends to be a place, a community, where people can talk about the software and animation in general, eventually helping each other to make it happen!