The problematic treated in this book is the modeling of software processes based on the UML language. The software process domain is one of the major concerns in software engineering in order to industrialize the development of complex software. In the literature, several modeling approaches have been proposed.Our work is part of this context, designing a graphical modeling workshop for software processes using the UML approach because of its standardization, simplicity and interoperability. A web application allowing to manage these models (creation, modification, deletion, visualization) and to put them at the disposal of a development team in order to collaborate between them, is associated to this work.