Zbrush and Houdini are still in their own category, untouchable though. Blender is getting close to the sheer pleasure that is sculpting in Zbrush, but there's

Zbrush and Houdini are still in their own category, untouchable though. Blender is getting close to the sheer pleasure that is sculpting in Zbrush, but there's still quite a ways to go. And Houdini's particle work is unequaled.