Dynamic Bone Container
A free alternative to the Dynamic Bone package that can interpret bone information and works for uploading to VRChat.
About:
In the past VRChat users had to purchase the third-party Dynamic Bone package in order to upload an avatar that featured dynamic bones.
Using this package, you are able to upload avatars that use dynamic bones without needing the original Dynamic Bone package.
It works by intepreting the original bone information and handing it to the VRChat SDK as expected.
The only drawback to this package is that you cannot test your bones inside Unity directly, only within VRChat.