Our software platform is designed, from the very beginning, to be extensible : not only is the library of available components (both hardware and software) for modeling open for extension with user-defined data; the set of features offered by the platform is also extensible, all of these features being provided by "plug-ins" (a.k.a. "add-ons", i.e. code modules) integrated into OPSWP. The purpose of this document is to describe the implementation of the Eclipse plugins developed by INRIA NGE within the development of the OPSWP, in collaboration with all project partners. More specifically, it describes in further details the functionalities cited in deliverable D2.1, at each plugin level. This document, not planned at the beginning, is part of task 2. The task's goal is the specification, conception and implementation of OPSWP, which is the main task of the INRIA NGE team.