Manage and compare email address lists. Load a single list and remove list items that contain or do not contain certain text, remove blank entries or delete duplicates. Also, load two lists and compare them with each other to keep matches or to keep non-matches (subtract). There is an option to save files as a comma-separated text file.
List manager and comparison program.
Remove duplicate emails from one or many file
Find duplicates files on your computer.
Remove duplicate lines or words.
Delete duplicate entries in MS SQL Server.