Advanced animations extension:

• Now you can create bone groups. Bones can be easily added to a group by keywords. For example if your skeleton have bones "mixamorigLeftHandRing4,mixamorigLeftHandPinky1,mixamorigLeftHandPinky2" you can just write "hand" and all bones containing this word will be included to the group
• To exclude certain bones you can use "". Example: you have bones "UpSpine,middleSpine, middleSpine2" and you want to add only "UpSpine,middleSpine" to your group. Just write "spine" to achieve this
• Different animations can be played for certain groups independently
• Transition between animations can be called for picked bone groups independently
• Transition can move your bones to a start frame, end frame or any custom frame of the picked animation. An expression to find out frames amount for a certain animation is included

Video example: https://www.youtube.com/watch?v=6tyYSG17OJY