Gantt Chart online [closed]
Have a look at the flot jQuery plugin:
Flot is a pure Javascript plotting library for jQuery. It produces graphical plots of arbitrary datasets on-the-fly client-side.
The focus is on simple usage (all settings are optional), attractive looks and interactive features like zooming and mouse tracking.
The library can produce bar graphs, and is used by our host site - have a look at Stack Overflow Reputation History page.
This is a complete jQuery based Gantt Editor Mit licensed
http://roberto.open-lab.com/2012/08/24/jquery-gantt-editor/
If you want a "complete" review of available ones see here:
http://roberto.open-lab.com/2012/06/14/the-javascript-gantt-odyssey/
I Have recently added SVG based drawing and collapse/expand tree functionality.
See http://roberto.open-lab.com/2014/05/15/jquery-gantt-editor-collapsible-branches/
For me, the best is http://gantter.com/ you don't need registration process, it exports to msproject or pdf.... perfect!