GanttProject is a cross-platform desktop tool for
project scheduling and management.
It runs on Windows, Linux and MacOSX, it is free
and its code is opensource.
It can do:
* Gantt chart: create work breakdown structure,
draw dependencies, define milestones.
* Resources: assign human resources to work on tasks,
see their allocation on the Resource Load
chart.
* PERT chart: generate PERT chart from Gantt chart.
* Export: save charts as PNG images, generate PDF
and HTML reports.
* Interoperate: import projects from and export them to
Microsoft Project formats.
Export to spreadsheets with CSV.
* Collaborate: share projects with your colleagues
using WebDAV.