GanttProject 2.0.7 is available for downloading. Platform-independent ZIP archive and installer for Windows are ready, MacOSX and Linux packages will follow soon.
The major improvement in GanttProject 2.0.7 is resource chart performance. It is an order of magnitude faster, and now working with complex projects with many resources and assignments will be much easier.
There is also a dozen of less important bugfixes. See the complete release notes here:
and download GanttProject from our SourceForge download page