There is also Spriter. Its not open source but there is a free version and the paid version was a kick starter and they had it for sale at a low price on Humbl

There is also Spriter. Its not open source but there is a free version and the paid version was a kick starter and they had it for sale at a low price on Humble bundle at times. https://brashmonkey.com/spriter-pro/ https://brashmonkey.com/spriter-pro/