Synfig Studio (Synfig) is a free and open source 2D vector graphics and timeline-based animation software. Developed by Synfig.org
License: Open Source
Synfig Studio is a powerful, vector-based animation tool designed for complex animations, while Pencil is more suited for traditional hand-drawn styles and is easier for beginners. Synfig offers extensive features for detailed work, whereas Pencil focuses on simplicity and speed.