About
From Synfig Studio :: Documentation
"a powerful, industrial-strength vector-based 2D animation software package, designed from the ground-up for producing feature-film quality animation with fewer people and resources." (Synfig main site - Overview) [1]
"that was the original idea from day one---the elimination of the tweening process. But it is certainly not the only feature of Synfig that makes it unique. In addition to eliminating the tweening process, I also wanted Synfig to be used for pretty much every part of production except story-boarding and editing." (OSNews, Robert Quattlebaum) [2]