Rigify in Blender

MMD is fine for posing, but in Blender (and many other 3DCG softwares), you can use something called Rig (not to be confused with rigging).

It’s like camera rig, but for 3D models. For example, you can pose fingers without manually rotating them!

Blender has Rigify, which is a great Rig system.

credit: Grayちゃん by らりほま & me