Any Gantt chart plugins, tools, or example code>

I am looking for a way to easily generate gantt charts from Rails. The
way I am considering is drawing
the chart from RMagick, but would prefer an existing solution if it is
available. It does not look like Gruff
handles Gantt Charts.

Thanks in advance

Timeline, while not technically a gantt chart, has much of the same
capabilities and a slick google-maps-like AJAXy feel. It is easily
integrated into a Rails project.

Also check out redmine and ProjectLounge Lite, which are rails-based
project management systems with built-in gantt charting. They're open-
source; you can see how they do it.