Recommend 3D texture tool ?

[Gohome]

I have a problem on 3D model texture. I want to do Chinese chess textures, but I have no idea how to do it.
I have tried mudbox, but this tool is hard to use. I also found another tool, zbrush. But in free version, it can not export textures.
So, I want to ask which tool is easy to use ,export textures and free. Or others suggestions.
Thanks a lot
Sorry for my poor English   m(_  _)m