You have just bought PowerBasic 10 and now you are looking for additional tools?
Ok, here are some. At first a completly free Visual Designer for PowerBasic: QTAB.
Author: Jules Marchildon, Mississauga Ontario Canada
QTAB-Original Files (http://www.powerbasic.com/support/downloads/tools.htm)
QTAB is a good point to start. And its completely free!
One more "nice to have" is the Class Builder Tool (http://www.powerbasic.com/support/pbforums/showthread.php?t=48273).
I have attached the last QTAB Release to this Post.