With Filestar you get 14 different skills for working productively with MikuMikuDance Model File (.pmx) files.
About .Pmx
Name
MikuMikuDance Model File
Extension
.pmx
Category
3D
Developer
SME (Sony Music Entertainment)
Description
PMX is a 3D model file format for the MikuMikuDance (MMD) animation software. It is used to store 3D mesh data, bone data, and other information necessary to animate and render 3D models in the MMD application. The PMX format is a binary file which can be either exported from or imported into MMD.