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...
Microsoft Office Excel - Microsoft Office Excel is a commercial spreadsheet application.
GanttProject - Project scheduling and management tool
LibreOffice - Calc - LibreOffice Calc is the spreadsheet program you've always needed. A fork of OpenOffice.
OpenProject - OpenProject is an open-source project management software with a wide set of features and plugins.
Airtable - Airtable works like a spreadsheet but gives you the power of a database to organize anything. Sign up for free.