This document discusses implementing CMMI process improvements using open-source tools. It outlines a roadmap for CMMI implementation including defining processes and templates, version control of documents and source code, and relating process areas and practices. It provides examples of open-source and proprietary tools that can be used for different CMMI process areas like project management, engineering, and support. The document also shares the experience of Multicert, who implemented CMMI DEV v1.3 using a mix of open-source and proprietary tools, starting with processes before selecting tools, and controlling acquisition and maintenance costs.