Teamwork Gantt by Open Lab is based on #jQuery and provides features such as: in-place editing, drag&drop, zooming, do/undo, multiple dependencies, full editing, dates shortcuts, css skin, multiple browser, resources editing, multiple assignment, milestones, export data in JSON format, resize & scroll, etc.
Get it here http://bit.ly/VTH0zI
Ext Gantt is commercial solution by Bryntum based on #ExtJS, offering features such as: dependencies, resources assignments, PDF export, MS Project import, printing support, baseline tracking, easy theming and more.
Find more about it here: http://bit.ly/ZTPR9O
Do you use something else for gantt charts?