Government agencies and organizations are increasingly collaborating on open source projects. The document lists several resources for government open source projects including conferences, data repositories, and nonprofit organizations supporting collaborations. Charts show the growth in open source initiatives worldwide from 2000 to 2009, with the most projects approved in Europe and Asia. Examples of government open source projects involve data analysis and visualization platforms from organizations like Sandia, Los Alamos, and Kitware. Benefits of these collaborations include avoiding vendor lock-in, leveraging a diverse team, and improving the open source project. Challenges can include relaxing proprietary restrictions, dealing with government bureaucracy, and balancing commercial and academic deliverables and publications.