MOOS Project Viewer 4.2.0 screenshot MOOS Project Viewer is a Microsoft Project viewer that can open any MS Project file type (.mpp, .mpt, .mpx, .xml) for any Microsoft Project version (2003, 2007, 2010, 2013, 2016, 2019). Available views: Gantt Chart, Task Sheet, Resource Sheet etc. Download MOOS Project Viewer 4.2.0