>>In otherwords, its a group of classes that you use to create an application.
>
>Which is different than a third part framework... how?

IMO, a third party framework already has many of those pieces put together. Using the FFC, you still have to pick and choose what pieces you need, create forms pretty much from scratch, etc. With the third party products is almost as easy as run a wizard to do things like create a parent/child data form.