Virto SharePoint Cross Site Lookup feature allows SharePoint users to reference existing data in SharePoint list easily and intelligently, access list items from across your Site Collection, and add automatic duplicate removal and find-as-you-type functionality to your lookups.
Virto SharePoint Cross Site Lookup quickly cross-references existing data from a list or site within the same site collection and then applies a combination of filters to reduce the number of options presented in the dropdown menu of your lookup field.