I have many Microsoft Project files but use a Mac. I switched to ProjectLibre and simply opened all my project files in ProjectLibre and kept working. The Gantt Chart, Network Diagram, WBS chart along with advanced features like Earned Value costing all work identical to MS Project.
This is AMAZING software and open source!!!!
LibreOffice - Free office suite, open source, and compatible with .doc, .docx, .xls, .xlsx, .ppt, .pptx files. Updated regularly – download for free. Originally based on OpenOffice.org.
Microsoft Project - Microsoft Office Project gives you robust project management tools with the right blend of...
WPS Office - Would you need Office Word, Excel or PowerPoint for Home, business or School? WPS.com would give you right version for you.
GanttProject - Project scheduling and management tool
Asana - Asana project management is an effort to re-imagine how we work together, through modern productivity software. Fast and versatile, Asana helps individuals and groups get more done.
OpenProject - OpenProject is an open-source project management software with a wide set of features and plugins.