ListMan Pro is a System Utilities software developed by THE MEETING JUNCTION. After our trial and test, the software is proved to be official, secure and free. Here is the official description for ListMan Pro:
Edit by Brothersoft: This program will help you to manage your lists of email addresses.
Load in a list and the program will remove duplicates, find specific addresses, save n amount of addresses as a text file or a comma delimited file ready for pasting into your favourite email program.
Program can handle huge lists. Simply load a second list to append it to the first.