This editor is as far I know the most complete one built in jQuery. Regarding Ext.js the Bryntum's one is far the best I found. Here I compiled a list of available ones: http://roberto.open-lab.com/2012/06/14/the-javascript-gantt-...
One thing that would be great to add to the overview (if you´ve still got the demo files) is how large the download is - it´s one of the things that spoke against Bryntum's solution (over 2 MB!).
/Mats (Bryntum founder)
It would be great if you guys could show off your skills in a optimized demo site...
GET ext-all.js 304 OK cdn.sencha.io 442.4 KB 253ms
GET gnt-all-debug.js 304 Not Modified bryntum.com 282.4 KB 251ms
With a clean Chrome, purged cache: I get "38 requests ❘ 829.55KB transferred ❘ 1.52s (onload: 1.07s, DOMContentLoaded: 1.07s)"
And this is still without making any effort to custom build Ext JS. We're using ext-all.js for simplicity, and to make use of Sencha's CDN which should speed up world wide access compared to us hosting a custom file.
Hope this settles it :)