Limber for After Effects
IK system for After Effects using shape layers as limbs for character animation
10 Alternatives To Limber for After Effects
AnimeEffects
AnimeEffects is a 2D keyframe animation tool based on deformation of polygon meshes.
Creature
Creature 2D Skeletal and Mesh Animation Tool
DragonBones
DragonBones is an open source project for 2D skeletal animation.
Duik
Comprehensive animation and rigging toolset for Adobe After Effects
Joysticks n Sliders
Pose-based rigging system for After Effects
Live2D Cubism
Live2D is the world’s first drawing technology to enable 3D rendering of 2D images.
Marionette Studio
Marionette Studio is an online animation software for beginners and professionals. Animate 2D characters and environments in minutes with no prior skills.
Nima
Build, rig, and animate 2D characters optimized for game engines and applications.
Synfig Studio
Just another WordPress site
enve
A new open-source 2D animation software for Linux.