We are about to launch Creature, the Automated 2D Animation Tool.
It supports UE4 through its provided source code UE4 runtimes/plugins.
Here is a short UE4 Integration Demo of what to expect:
What is unique about the tool:
Automated Procedural Animation. This means secondary motion like walk cycles, floppy hair, cloth, flesh dynamics etc.
are done easily using Creature’s built in physics and procedural system. Animations are written back into keyframes during export.
Advanced VFX Features in a 2D tool. Soft Body Dynamics, Motion Capture, Video Rotoscoping, Path Motion Transfer and more.