The Decision Deck project's goal is an open source collaborative development of a generic Multiple Criteria Decision Analysis (MCDA) software platform composed of modular components. Its genuine purpose is to provide effective tools for decision aid consultants, for researchers in the field of MCDA, as well as for OR teachers. Besides, the software should give a user the possibility to add, modify or simply use existing plugged-in functionalities (plugins). These constituents can either be complete MCDA methods or elements common to a large range of procedures. The aim of this presentation is to detail the latest developments of the Decision Deck project and of the XMCDA standard, which aims at structuring the inputs and outputs of MCDA software components in a common way.