This is an implementation of referencebrowser widget. It provides a widget used for Archetypes reference-fields. The widget can be used on its own or as a dropin replacement of the ATReferenceBrowserWidget in Plone 3 and is included in Plone >= 4. Unlike the ATReferenceBrowserWidget, archetypes.refencebrowserwidget uses an overlay instead of a popup to display the referencebrowser.
Version 1 of the product is a classical popup and works with Plone 3 and 4. Version 2 of the product displays the browser as a jQuery overlay. Currently it is only tested with Plone 4 and Plone 5.