Hi again,
Fragmotion can be used without buying it (for 50 USD), if you type in the prayer text appearing weekly. A bit strange, but makes it free 
http://www.fragmosoft.com/
It is basically for animation, but can be used also for modelling. A bit old school, but updated, I tested its FBX exporter today and everything works fine with UE4. You can adjust keyframes by LUA scripting. It offers a couple of 3d file format conversion options, useful for hobbyists/modders, or if you port your work from another game engine.