I will start this talk by briefly overviewing an emerging technology called Graphical Modeling Framework (GMF). GMF belongs to the family of Eclipse technologies, and researchers can use it to rapidly build complex graphical applciations, either embeded in the Eclipse environment or standalone as rich clients. I will then demonstrate how one can build a simple graphical editor using the GMF. After that, I will introduce and demonstrate (in its current to date state) the Web Services Composition Editor and Simulator, which utilizes Reo as a composition/coordination language for Web Services. With this talk I aim to spawn interest in the SEN3 group towards using Eclipse core and generator technologies (GMF as one of these) for the development of the group's scientific tools.