2D animation software studio
synfig is a vector based 2D animation package. It is designed to be capable of producing feature-film quality animation. It eliminates the need for tweening, preventing the need to hand-draw each frame. synfig features spatial and temporal resolution independence (sharp and smooth at any resolution or framerate), high dynamic range images, and a flexible plugin system. synfigstudio is the animation studio for synfig and provides the GUI interface to create synfig animations which are saved in synfig .sif or .sifz format.
Homepage: https://www.synfig.org/