GARRISON  Not much to say about a excellent product I've been using for many years to manage multiple servers; very flexible and powerful. If using the command line to manage servers doesn't get you excited, then this is what you are looking for.   
(Version 1.260)

ANONYMOUS  check out this webmin theme:

http://www.stress-free.co.nz/content/view/141/2/  
(Version 1.240)

ANONYMOUS  webmin is an ugly piece of goods, but man is it useful! it does things that osx server admin tools can't and it's so much more powerful.

don't use the built-in server tools - use webmin. its more functional and everything is in one place.

the only thing i'd like to see is an answer for Workgroup Manager, that is, the user setup in webmin is too limited. everything else is great though.  
(Version 1.210)

VISH VISHVANATH  I have been using Webmin for about three years + to administrate Linux & BSD boxes, and have also installed it on my OS X laptop to have a system-level admin tool.

Webmin is a friendly wrapper around the core configuration of a UNIX system, TP services and daemons. It's very extendible with modules available for many functions and applications.

VirtualMin is a fantastic example and brilliant for anyone who needs to run multiple hosts on a single box.

Webmin doesn't replace the need for understanding how a UNIX box works or is configured. If used by someone in this way, it can end in tears (I speak from experience).

It's also an excellent way of granting certain administrative privileges to people without also giving them access to the box.

If you don't understand UNIX, this may help you learn. If you don't care about understanding UNIX, I suggest you stay away from Webmin. It's too powerful for you.  
(Version 1.210)

AMBITIOUSLEMON  Webmin IS ugly. But it is also fairly configurable. So you can make it look better if you take the time. Unfortunately there aren't any good themes ready for download so you need to do it yourself. I will admit that i haven't spent the time to make it look better for my users until recently. But I am finding that given soem time and effort you can make it better.  
(Version 1.190)

ANONYMOUS  It IS great. It's just too bad it's uglier than Cinderella's stepsister.

My web host, Textdrive, uses Webmin and Usermin as administrative interfaces for users. Most relatively savy admin types have no problem using these tools. However, many average users signing up are very put off and confused by Webmin. Ideally, Webmin would combine a good interface (like cpanel) with its excellent functionality.  
(Version 1.190)

ANONYMOUS  Goes a long way into making OSX into a REAL unix. (If an aspect of a system's functionality is only available while physically sitting in front of the box, it's not unix.)  
(Version 1.170)

ANONYMOUS  webmin is too grrrreat!

Really, that's no joke!!!

It's the best administration module that was ever made!!!  
(Version 1.130)

XAVI  Our System Preferences should be like this great app. We have a nice Unix box, so take all advantages from it!

Perfect! furhtermore, Catalonian language is available. Nice work :)  
(Version 1.130)

ROBERT JOHNSON  Webmin can be very useful, it's like the "System Preferences" for the BSD layer. My own most common use of it is for configuring the mail server (Postfix now, and sendmail back in the day). I installed Webmin via Fink, however.  
(Version 1.130)