Webmin: Web-based System Administration
If you're running Apache, MySQL or just about any other service, this one's for you. I ran into Webmin over the weekend as I embarked on re-building my home server (all Linux!).
I was finding the new Apache configs a bit of a handful so I started searching. Didn't take long to find this amazing tool for Linux (there's a Windows alpha available as well).
And of course, it's free.

