Splice for 3ds Max
Fabric Software has posted a video of the upcoming Splice plug-in for 3ds Max.
Labyrinth for 3ds Max
Labyrinth is a spline plugin for 3ds Max which allows users to create splines on any given object in 3ds Max.
The Animator's Toolkit is a compact suite of modular tools to rig, copy and manipulate animation, for 3ds Max.