Dragref is a project mainly written in PHP, it's free.
Helps setup a nice nodereference UI using automodal and draggableviews. This is mainly an experiment and I DO NOT recommend using it on a production site.
This is an attempt at a 'Configurable Feature' for Drupal. It consists of a default panel, view and variable override to setup a nice UI for adding and ordering a child content type which has a nodereference to a parent content type. It attempts to make the content types themselves ambiguous by giving you a setting page to control which is the parent, which is the child.
@see dragref.info