GNOME Planner is a cross-platform project management tool based on the Work breakdown structure (WBS). Developed by Richard Hult and Mikael Hallendal, Imendio
License: Open Source
GanttProject is a versatile, cross-platform tool with robust resource management and Gantt chart capabilities, ideal for detailed project planning. In contrast, GNOME Planner is simpler and best suited for lightweight project management within the GNOME environment, emphasizing ease of use and collaboration.