ngSkinTools is a skinning plugin for Autodesk Maya, introducing new concepts to character skinning such as layers, any-pose-mirroring, enhanced paint brushes, true smoothing, and more.
Polygon modeling tools for manipulating a mesh using dynamically created NURBS curves and surfaces to distribute vertices and/or UVs, plus some selection tools to complement the workflow.
Soft Cluster EX is a python and c++ based tool for converting soft selection to cluster or joint, supports common types of deformable geometry(e.g. polygon,nurbs ,subdiv and lattice) with a lot of advance features.