The best free alternative to Live2D Cubism is Synfig Studio, which is also Open Source. If that doesn't suit you, our users have ranked more than 10 alternatives to Live2D Cubism and seven of them is free so hopefully you can find a suitable replacement. Other interesting free alternatives to Live2D Cubism are enve (Free, Open Source), AnimeEffects (Free, Open Source), DragonBones (Free, Open Source) and Expressive Animator (Free, Open Source).
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.
Most users think Synfig Studio is a great alternative to Live2D Cubism.
E-mote is an engine which can create smooth and stereoscopic animation in a few steps from the character's 2D illustration. You can easily and dynamically move the expressions, orientations, limbs of standing pictures characters and make it look 3D.