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!!!!
Microsoft Project - Microsoft Office Project gives you robust project management tools with the right blend of...
GanttProject - Project scheduling and management tool
OpenProject - OpenProject is an open-source project management software with a wide set of features and plugins.
Smartsheet - Smartsheet is an intuitive online project management tool enabling teams to increase productivity using cloud, collaboration, & mobile technologies.
Basecamp - A simple and elegant project management system.
Asana for G Suite - Fast-moving teams rely on Asana to coordinate and manage the work they do in G Suite.