Compressed hand pose data file used by Poser, a 3D character modeling and animation program; includes pose data specific to a character's hands, such as hand motions and finger positions.
Uncompressed Poser hand pose files use the .HD2 extension.
Program(s) that open hdz files
Mac / Windows: Smith Micro Poser
Information from FileInfo.com - The File Extensions Resource.
http://www.fileinfo.com/extension/hdz
