No one mentioned my most important two utilities.

 Shaper/Masa: For Melting body parts to one unified part, and restore original body parts from unified obj. Must have when you create multi part body morph. You must send e-mail to creator for getting key-code, but it's free.

http://www.eurus.dti.ne.jp/%7Emasasi/DOWNLOAD/shaper/index.htm

Poser File Editor/Dimension 3d: Mainly used for loading morph target from modified multi-part obj. Also very handy to remove un-used body parts from pose file. Have many other features to edit most of poser files.