Timberwolf

While not actually free I use several low cost tools to create JCMs using the Poser Morph Loader.

Primary to my tool set is Silo, which is my preferred modeling software. It can also be used to create morphs using the morph loader to export the figures using the HEXAGON check box. One other quirk with Silo is that you should use Objaction Scaler to increase the size of the exported figure by a factor of 10 or so since Silo doesn't play well at Poser's native scales, Once you are satisfied with the morph save it as an object from Silo and use Scaler to reduce it by the same factor you increased the size.

I also use Argile by N-Sided. This is sort of a low priced package that has some of the features found in Mudbox and Zbrush soft body "sculpting" but it retains the vert order etc. needed by poser very well. Again I use the Morph Loader in Hexagon mode.

Argile's biggest draw back (for me) is that while you can import 2 objects (merge them) Argile's tools will work on both imported objects. So I have a sort of fix that might work with any 3D software, altho I use Silo again. I expand the objects that are exported from Poser as written above. I then import the base figure (say V4) that was exported in the posed positions from Poser, I also import the posed clothing figure. Once in Silo I can look at the 2 figures together and determine where to make the morphs changes. I them load the expanded clothing figure into Argile and use it;s tools to make the changes based on my estimates as seen in Silo and export THAT figure with a new name. I delete to clothing in Silo and import the changed object to compare my morphs to the posed V4. For tiny changes I just do them in Silo, sometimes I have to go back and forth between the programs to get the results I want. Once satisfied I reduce the final morphed object and use Morph Loader to import it as an FBM into the clothing in Poser.

As awkward as this may sound, believe me when I say that Morph Loader has reduced the actual amount of work needed to get good looking morphs and also increased the accuracy I can get!

Oh, I have used Carrara on occasion as well, but I have to say, with mixed results. Sometimes the morphing process works fine using the Morph Loader other times I get an incompatable mesh error. I'm reasonably sure this is due to something I've done in Carrara, but I haven;t had time to track down to a specific operation. The reason I'm sure it;s a Carrara problem is that I've had a few other issues with clothing objects even with out Morph loader... In several cases the facet order seems to be saved from Carrara on a random way the "scrambles" the faces UV order. I think the problems are related, but I'm not sure exactly what causes the problem.

Hope this helps a little at least.