If you ever heard or even seen Quest3D and Virtools then I guess that you have seen the programming paradigm they are using of a flow chart like language. Apart from Quest3D and Virtools do you know of any other similar engines that are using the same programming style?

There's a nice big list of things like that here :D

edit: also a quick google for 'vpl'/'visual programming language' brings up a few things that look like texture creation tools that use discrete components like that

edit2: werkkzeug1 is also good