well the only one I remember right now and we have here on Palaceplanet is this one:
avatarmaker
This is a windows only tool, very basic. We used to have another tool by Dan that was very useful but to be honest I forgot the name. Must have it backed up somewhere.
Ok, so opened up my Parallels Windows thingy and found my old Palace folder with......
Galen <-- just click the link and it should download.
Need to add this to the windows download page I guess :) hope this helps out and works on whatever windows you want to use it. Works fine on XP.