   UML/OO Design Software?
  Hi! I've been plagued with some redisigning issues. I'm working on an SDL framework called XEngine, and I'm finding it difficult to organize my classes and namespaces.Writing plans down on paper is a bit tedious and troublesome when you want to make changes (erase, erase, erase!). Does anyone know of some freeware software for designing OO applications and to create class diagrams? It'd be nice to know exactly what I'm doing before I set out to do it. I'm just learning now that you can't really create software when all you know is what and not how. ^_^Thanks!   
ArgoUML.   