I was wandering the web and hit upon an article at Blendernation about a sculpting tool.  Called Sculptris,this little and I mean little program was created by Tomas Pettersson.  It's a program similar to 3D Coat and Zbrush.  It's a light weight program that you don't have to install. Upon starting it up, I was wowed by how fast it loaded.  Then I started to play around with it and I noticed how easy it was to pick up.  The UI is so simplistic.  The way it worked just made sense.  I never really picked up Zbrush because it seemed so foreign.  After using Blender to sculpt and then using Sculptris,  you could see the clear winner.  Sculptris just by ease of use and performance wins hands down.  Now if Blender can have sculpting performance like this, it would be great. If you want to check out the program, visit Tomas's site at www.drpetter.se.  The program is currently in beta right now (don't be afraid, it's pretty stable).  Like I said earlier, you don't have to install the program either.   It isn't opensource, but it is free unless some company offers him millions of dollars.  Oh, it's only for windows right now (people have got it working with WINE in Linux though), but porting will probably be in the near future.