The Duplicate Contact Manager searches for duplicate contact pairs and presents each pair to the user. The user can decide how to handle the pair.
Currently only one address book can be searched at a time. Users with multiple address books cannot search for duplicates between address books. This feature is planned for a future version.
(de-dupe, dedupe, duplicates, doubles, redundant, dupes)
You can provide feedback via the mailing list/Google group:
You can report bugs and further support the development: