So as you may notice i haven't been able to update these plugins in the website for a while, i have been having a lot of work lately with other projects and couldn't keep working giving support and updates of these free tools. So i decided instead to make the source code available for the public for those of you who want to play around with it or to make a build for the newer versions of 3ds Max.
You can download the code following these links in the "Source Code" section:
IKFKSolver
Animatable Pivot
You can download the code following these links in the "Source Code" section:
IKFKSolver
Animatable Pivot