Doubt about draggable flowchart support

Doubt about draggable flowchart support

Hi,

We're migrating a web application currently using a legacy 2d drawing support. Our goal is to rewrite the 2d drawing using jquery (mostly native, or plugins if needed).
We have to implement a flowchart like the one in this picture http://www.flowhelp.com/flowchart/make_a_flowchart.gif (just rectangles will suffice). Boxes can be easily made using .draggable(), but connecting lines and labels are another matter. Is there some support to an extended 2d drawing, i.e. a flowchart plugin?

Thanks.