I've added sortables/drag-and-drop capabilities to EWB with my Nice library.

The source code to use it is trivial and the feature really makes your applications pop.

See source and demo at:

https://erickengelke.com/h/posts/post19/

Let me know if you have other ideals for controls.  If they are general enough, I will implement them.  I also
do contract work for private controls.
EWB Programming Books and Nice Component Library
See my EWB BLOG posts, at:
http://www.erickengelke.com