Today we released our extjs 4 based Flow chart component [Beta Version]. There are still lots of things need to be added / updated. However, it works and can easily generate a professional looking flow chart. Have a look the demo public view [View only - after your login, you will be able to edit it]:
And here is the online flow chart document for quick how to use it:
You can also FREE signin and have a try @:
Any suggestion are really welcome and appreciated.