Brilliant!

If you develop WordPress sites the right way you will probably do this on a local install. Then bring it to a staging server, to test the site and show to clients before the site goes live. But moving WP sites between servers can be a pain. There is the database, where changes need to be made in the options table to match the different domain. Then there is your theme files, the plugins, your image uploads and the WP files, which may have changed after you installed them. WordPress Duplicator does it all at the same time, making the process of moving sites easy and superfast.
Definitely a 5 star plugin!

And o yeah, it is free, unlike other solutions I used in the past…