Synfig is a free and open-source, industrial-strength, vector-based 2D animation app designed for producing feature-film animations. It eliminates the need to create animations frame by frame. It is available for Windows, Linux, and macOS.
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Features Suggest and vote on features
⚫︎Automated TweeningSynfig Studio can automatically generate the inbetweens from two keyframes, to carry out a smooth transition.
⚫︎Keyframe AnimationCompositions can be keyframed in Synfig Studio, allowing you to change the parameters over time.