Download IK Helper Tool Free Unity. 

Ensure perfect animation retargeting to your humanoid characters!
This tool helps you to fix misplaced hands or feet when retargeting animations between humanoid characters.

DOCUMENTATION | FORUM THREAD

Attention!
Make a backup of your project before updating to version 1.1.
This script is included for FREE in the following asset packs:
– Animations Pack Mega Bundle
– Villager Animations Pack
– Melee Warrior Animations Pack
– Caster Mage Animations Pack

Includes example scene with 2 characters and 7 animations. Prefabs are ready with the script configured.