These forums are locked and archived, but all topics have been migrated to the new forum. You can search for this topic on the new forum: Search for difference on the new forum.
Web Hosting and Cloud Computing Control Panels
Howdy,
Usermin is an app that allows users to check email, setup mail filters, and the like.
Webmin is a sysadmin tool for managing a server. It's typically used by the server owner.
Virtualmin is a Webmin module for allowing individual domain owners to manage settings relating to their domains, including websites, ftp/database access, email, and so forth.
You can see some of the features listed here where Virtualmin Pro, GPL, and competing products are compared:
http://www.virtualmin.com/compare.html