http://9vae.com/en/
9va-win is a Windows version of '9VAe' which is the powerful FREEWARE for creating animation ( 9va-mac / 9va-win / 9va-pi(Linux)).
9va-win can export animated GIF / SVG SMIL Animation , and EVA (vector format: Extended Vector Animation).
You can create complex animations from fewer keyframes.
The following sample animation was created from 2 pages figures
How to make Animation with 9VAe Shishi - Lion Dance
https://www.youtube.com/watch?v=tzMoc1zwkAQ&t=97s
https://www.youtube.com/watch?v=_Wv7An3CncQ
9VAeで獅子舞アニメの作り方