GanttProject is free Java based, project management software that runs on the Windows, Linux and Mac OS X systems. Developed by Dmitry Barashev, Alexandre Thomas
License: Open Source
Priority Matrix is a time management software application that is supported on a number of platforms, including Microsoft Windows, Mac OS X, Android, and iOS. It is based on the Eisenhower Method of arranging tasks by urgency and importance in a 2x2 matrix. Developed by Appfluence Inc
License: Commercial
Priority Matrix is primarily focused on task prioritization and collaboration, making it ideal for team-oriented projects, while GanttProject excels in project timeline management with its robust Gantt chart feature. Users seeking a simple task management experience with collaboration will prefer Priority Matrix, whereas those needing detailed project planning and time tracking will find GanttProject more suitable.