No need to work with printed materials or static reports in different formats (html, pdf, excel, etc.). It is running on any Java enabled platform including Windows, Mac OS X and Linux and it is the perfect solution for project stakeholders to view the project details in a dynamic way. Available views: WBS, Gantt chart, task sheet, resource sheet, resource usage. MOOS Project Viewer is a Microsoft Project viewer that can open any MS Project file type (.mpp.