Duplicates Remover for Outlook (System Utilities -/- Automation Tools) [Release Date 12.09.2007]
Delete duplicate contacts, notes, tasks, etc. in Microsoft Outlook; searching across folders. A duplicate found can be marked, copied or moved to any folder. Works as an add-in for Microsoft Outlook 2000-2007.

PD Duplicates Cleaner (Network Internet -/- Other) [Release Date 24.05.2007]
PD Duplicates Cleaner is a full Windows desktop application that can be used to find and delete duplicate Palm Desktop data.

Remove Duplicates from Outlook Express (Network Internet -/- Other) [Release Date 01.09.2006]
Remove duplicate emails in Outlook Express folders and dbx files. Searching across the several folders. A duplicate found also could be deleted, copied or moved to any folder. Free trial.

DuplicatesRemover (Business -/- Databases Tools) [Release Date 30.09.2003]
The DuplicatesRemover reads the data from one or multiple Excel files and examines whether there are any duplicate entries in the files. If this is the case, the duplicates will be deleted and written in a new Excel spreadsheet.